* If you can't find very fine espresso powder, you can dissolve the 2Tbsp in 1 Tbsp hot water. Cool completely before adding to the frosting.
** Ensure there is NO trace of egg yolks in your whites and that your mixer bowl and whisk is completely grease free or your meringue won't stiffen.
*** The buttercream may look like it's curdled at some point. Keep mixing until it is completely smooth.