Take your box cake mix to the next level with this easy recipe! A few simple additions make it extra moist and delicious.
Alright, *almost* scratch cake is a bit of a stretch. It’s mostly a box cake with stuff added in to make it even better.
Some bakers scoff at box mixes, think it’s sacrilege and only bake from scratch. I’m a whatever-works-for-you kinda baker and sometimes it’s just easier to whip out a box.
How to Make Box Cake Better
Adding a few simple ingredients makes a world of difference. Trust me you will never go back to a plain old box cake mix ever again!
Here’s what you’ll need:
box cake mix
all-purpose flour
sugar
salt
large eggs
water (or milk)
vegetable oil
vanilla
sour cream
The sour cream is the secret ingredient I think that makes this doctored box mix extra moist and flavourful.
I recommend using full-fat sour cream because really, we’re not about saving calories at this point, right?
Boxed Cake Mix Recipe
Making this cake is just as simple as any box mix, just with a couple of other ingredients. To make it all you need to do is:
whisk the dry ingredients together
add the wet ingredients
mix on low until combined
This recipe works great for two 8″ cake pans or three 6″ pans. It can be scaled up for larger pans though too. I use this site as a guideline when I’m scaling recipes up or down.
I like to use Homemade Cake Release on my pans and line them with parchment to make sure the cakes come out perfect every time.
I also use Baking Strips around the sides of my cake pans to make sure the cakes bake perfectly flat and don’t require any trimming (no wasted cake scraps!).
If you’d like to make your cake extra moist (or if you’re worried you’ve over baked it) you can add some Simple Syrup to the cooled cake layers. I recommend trimming a bit of the top crust first so the syrup really soaks into the cakes.
These days I mostly bake from scratch, but I used to use this recipe all the time when I was focussing on cake decorating. It bakes up a very sturdy and delicious cake!
I’ve yet to recreate the delicious flavour and texture of a classic vanilla box mix cake though. My Vanilla Cake recipe comes close, but it’s not quite the same. It is delicious though too, so you should try it if you haven’t!
I really like this recipe because it makes the box mixes a little more dense and super moist. This recipe is GREAT for a cake that will be decorated, stacked, etc. as the cakes have really good structural integrity.
This recipe makes two 8″ or three 6″ cake pans. You can use two 9″ as well but the layers will be thinner (reduce baking time accordingly).
To make cupcakes, all you need to do is reduce the baking time. Start checking at 15mins or so. The recipe should make about 24 cupcakes depending on size.
You can bake it in a 9×13 pan. Baking time will be slightly shorter.
You can bake it in a Bundt pan as well but you’ll need to increase the baking time.
For all other conversions, I use this site as a guideline.
Baking time will vary if you change the pan size. Every oven varies so I can’t say for certain what you’ll need to adjust it to. Be sure to check on the cake as it’s baking.
Will This Work With Any Box Cake Mix?
I’ve only used this method with yellow/white cake mixes, but it should work just fine with any kind of box mix.
For chocolate cake mixes, instead of adding 1 cup flour, you can add 3/4 cup flour and 1/4 cup cocoa powder if you like.
For a pure white cake, use a white cake mix and 5 egg whites in place of 3 whole eggs.
For box mixes, my go-to’s are Betty Crocker and Duncan Hines. The French Vanilla flavour is my favourite.
You can easily add some sprinkles to make this a funfetti cake instead, but be sure to use either jimmies or confetti as the small round nonpareils will bleed into the batter.
Other Tips for making this Doctored Cake Mix:
Do not also use the ingredients listed on the back of the box mix. Only the components in the recipe.
Be sure to use room temperature ingredients as this will yield the best results.
Use full-fat sour cream for best results. Yogurt is a good substitute as well.
Learn how to keep your cakes moist using Simple Syrup.
To help ensure your cake layers bake up nice and flat, check out my Flat Top Cakes post!
Add wet ingredients and mix until combined. I use my KitchenAid on low for 2 minutes but you can also do this by hand.
Divide the batter between the pans and bake for approximately 50 minutes.
Cool in pans on wire rack for 10mins, then turn cakes out onto wire racks to cool completely.
Notes
*I use French Vanilla, but you can use any yellow/white cake mix for this. I haven't tried with other kinds, but I imagine it would yield similar, delicious results.
The nutritional information and metric conversions are calculated automatically. I cannot guarantee the accuracy of this data. If this is important to you, please verify with your favorite nutrition calculator and/or metric conversion tool.
Originally published on Oct 10, 2014
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Tips, techniques, and troubleshooting to help ensure your cakes come out perfect every single time!
I LOVE this hack!
I use it on my red velvet cake orders!
I have never had a complaint yet! Everyone says it’s the best red velvet they have ever had! I had extra coco instead of the full cup of flour and of course extra food coloring!
Judging from your cake box picture it weighs in at 432g the box I have which is Betty Crocker, super moist, white is at 404g, so, I add the difference to make sure we are getting the same measurements!
Just a note to beware! Overall the cake sounds delightful!
I am trying this with Duncan Hines dark chocolate fudge as we type this. I did use 3/4 cup flour and 1/4 cocoa also. Will let you know the how it turns out. Also, I use butter wrappers in the bottom of my cake pans. Love doing that. Has anyone tried that. I save them when I use stick butter and keep them in the freezer.
Hi Luci! I want to say yes but I’ve never actually tried a GF cake mix. I’d say if the typical box additions are similar — eggs, oil, water, then it should be fine. I’d give it a go anyhow 🙂
Tried other ‘box cake improvement’ recipes, and this was by far the best. It’s such an easy recipe to use while baking with my grandchildren, and tastes great. Thanks!
hi. im making a dh french vanilla cake for sunday. can you tell me the measurements for the ingredients for this pan. im making 2 9×13 cakes. i have 2 boes of dh french vanilla. thanks Brenda
I have never seen extra flour added when improving a boxed cake. I want to use this to make an 18 x 13 inch sheet cake. How many times would I multiply the ingredients to fit the pan and how long should I cook iit? I plan to use baking strips to help it cook more evenly, another new experience. Very nervous about this whole thing, especially flipping it out.
Can I use cake flour instead of all purpose and if so would the amount be the same or less than a cup? Can I use vanilla bean paste instead of pure vanilla? Same amount?
Hi Tasha! No, you don’t need to mix the wet ingredients together first. Sugar can go in either but I usually put it with the dry. This recipe is really simple. You could just toss everything into the bowl at once and mix and it would be fine!
Incredibly good. This long-time baker (who rarely uses a box mix) was asked for an Easter bunny cake made from a funfetti mix. Not my jam, so I decided I could compromise on a boxed mix that had been “improved.” Came upon this recipe. Folks raved—including me!
Hi Carla! The cake is the typical sweetness of a box cake mix. The added sugar is because we’re increasing the volume of the recipe with the added flour and sour cream. The sour cream helps cut a bit of the sweetness too. You can definitely reduce the amount or leave it out if you like, depending on your sweetness preferences.
I just made this cake for the 2nd day in a row.
Didn’t even get to try the 1st one but I wanted to so badly because I also did the simple syrup on the layers.
Doing it all over again. I can’t wait to try it but yesterday’s crumbs left sticking on cooling rack was delicious!
Faye says
Can I use butter instead of veg oil.
Olivia says
Hi Faye! You can use cooled melted butter if you like but it will make the cake more dense.
Victoria says
I LOVE this hack!
I use it on my red velvet cake orders!
I have never had a complaint yet! Everyone says it’s the best red velvet they have ever had! I had extra coco instead of the full cup of flour and of course extra food coloring!
Olivia says
Hi Victoria! So glad you love it. Thanks for your tips!
Eva says
Hello, I love your recipe!
How many X do I need for a 12″ round single layer cake?
Thank you
Olivia says
Hi Eva! I’m so happy you love this one. Converting pan sizes is always tricky. Here are some sites I use as a guideline:
http://www.joyofbaking.com/PanSizes.html
https://www.cookipedia.co.uk/recipes_wiki/Cake_tin_conversion_charts
If you’re only doing a single cake layer I’m inclined to say leave the recipe as is and try that. Be sure to adjust the baking time as needed.
JudyNK says
Judging from your cake box picture it weighs in at 432g the box I have which is Betty Crocker, super moist, white is at 404g, so, I add the difference to make sure we are getting the same measurements!
Just a note to beware! Overall the cake sounds delightful!
Olivia says
Hi Judy! The new box size should still work fine with the amounts listed. Let me know how it turned out!
Paula says
I am trying this with Duncan Hines dark chocolate fudge as we type this. I did use 3/4 cup flour and 1/4 cocoa also. Will let you know the how it turns out. Also, I use butter wrappers in the bottom of my cake pans. Love doing that. Has anyone tried that. I save them when I use stick butter and keep them in the freezer.
Olivia says
Hi Paula! Great idea about the butter wrappers – less messy than some options for sure! Thanks for the tip I hope you love this recipe 🙂
Susan Shingler says
OMG Paula, what a great idea using the butter wrappers! I will certainly try this.
Luci says
Hi,
I made this cake and it came out delicious. I was wondering if it would work on a gluten free cake mix, with gluten free flour.
Thank you.
Olivia says
Hi Luci! I want to say yes but I’ve never actually tried a GF cake mix. I’d say if the typical box additions are similar — eggs, oil, water, then it should be fine. I’d give it a go anyhow 🙂
Luci says
Thank you very much. I will try it out!
W Jacobs says
Tried other ‘box cake improvement’ recipes, and this was by far the best. It’s such an easy recipe to use while baking with my grandchildren, and tastes great. Thanks!
Olivia says
Thanks, W Jacobs! Glad you liked it 🙂
Linda Barnes says
Tried the cake recipe with secret ingredients turned out really good
Olivia says
Glad you liked it, Linda!
Brenda M Lawson says
hi. im making a dh french vanilla cake for sunday. can you tell me the measurements for the ingredients for this pan. im making 2 9×13 cakes. i have 2 boes of dh french vanilla. thanks Brenda
Olivia says
Hi Brenda! I would 2x the full recipe for two 9×13 pans.
Paul says
Baking in a 9×13 pan. Will cook a bit less time I think.?
Olivia says
Hi Paul! It’s hard to say as every oven bakes differently. I always recommend checking the cakes as they are baking 🙂
Marci Milesky says
I have never seen extra flour added when improving a boxed cake. I want to use this to make an 18 x 13 inch sheet cake. How many times would I multiply the ingredients to fit the pan and how long should I cook iit? I plan to use baking strips to help it cook more evenly, another new experience. Very nervous about this whole thing, especially flipping it out.
Olivia says
Hi Marci! Converting pan sizes is always tricky. Here are some sites I use as a guideline:
http://www.joyofbaking.com/PanSizes.html
https://www.cookipedia.co.uk/recipes_wiki/Cake_tin_conversion_charts
How tall is your sheet cake pan?
Cesca Lamort says
Can I use cake flour instead of all purpose and if so would the amount be the same or less than a cup? Can I use vanilla bean paste instead of pure vanilla? Same amount?
Thanks,
Cesca
Olivia says
Hi Cesca! You can substitute both of those if you like. Same amounts.
Fran Clarke says
Milk is there a preference on 1 percent 2 percent or whole milk
Olivia says
Hi Fran! Any will work fine. Just use whatever is already in your fridge.
Traysi Elkins says
Can you do cupcakes with this version?
Olivia says
Hi Traysi! Yes, I talk about that in the post.
Tasha says
You don’t have to mix the wet ingredients together first?
Is the added sugar considered a dry ingredient?
Olivia says
Hi Tasha! No, you don’t need to mix the wet ingredients together first. Sugar can go in either but I usually put it with the dry. This recipe is really simple. You could just toss everything into the bowl at once and mix and it would be fine!
Joanna Rosano says
When you make it do you usually use water or milk?
What is better?
Olivia says
Hi Joanna! Both work perfectly fine but milk is better.
Linda says
Incredibly good. This long-time baker (who rarely uses a box mix) was asked for an Easter bunny cake made from a funfetti mix. Not my jam, so I decided I could compromise on a boxed mix that had been “improved.” Came upon this recipe. Folks raved—including me!
Olivia says
Hi Linda! Happy to hear everyone loved it 🙂
Carla says
This seems like a lot of added sugar, does it make the cake really sweet?
Olivia says
Hi Carla! The cake is the typical sweetness of a box cake mix. The added sugar is because we’re increasing the volume of the recipe with the added flour and sour cream. The sour cream helps cut a bit of the sweetness too. You can definitely reduce the amount or leave it out if you like, depending on your sweetness preferences.
Victoria says
Do you follow the recipe exactly as is or do you follow the box cake recipe plus the additions in this recipe?
Olivia says
Hi Victoria! I mention this in the post… “Do not also use the ingredients listed on the back of the box mix. Only the components in the recipe.”
Stefanie Derby says
I just made this cake for the 2nd day in a row.
Didn’t even get to try the 1st one but I wanted to so badly because I also did the simple syrup on the layers.
Doing it all over again. I can’t wait to try it but yesterday’s crumbs left sticking on cooling rack was delicious!
Olivia says
Hi Stefanie! I hope you love it as much as I do 🙂