Add the powdered sugar and heavy whipping cream, alternating between the two. I prefer to add 1 cup of powdered sugar, then 2-3 tablespoons of heavy whipping cream, letting it combine before adding the next round of powdered sugar and cream.
12 tbs heavy whipping cream, 5 cups powdered sugar
Add in the espresso powder, cocoa powder, salt, and vanilla and mix until combined.
1 teaspoon vanilla, ½ teaspoon espresso powder, ½ cup cocoa powder, Pinch of salt
Once everything is added, mix on high for 20-30 seconds.
Notes
Tips and Tricks
The original recipe called for ½ cup butter, which makes the frosting a bit stiffer. However, I really like the flavor and texture of using 1 cup, and that is what I recommend.
If the frosting is too runny, try refrigerating it for 5-10 minutes, or mix in additional powdered sugar ¼ cup at a time until it is to your desired thickness.
If the frosting is too thick, add more heavy cream a few tablespoons at a time until it's to your desired consistency.
After frosting, stick your cake or cupcakes in the fridge to help the frosting set.