3 1/2 c powdered sugar, you can always add more if you add too much milk
1/2 c cocoa powder
3-4 Tbs milk
1 Tbs vanilla
1/4 tsp salt
Instructions
To make the cupcakes:
Preheat your oven to 350º and line 2, 12 muffin cup pans with paper liners.
In the bowl of your stand mixer add the flour, corn starch, sugar, baking soda, baking powder and salt, stir to combine.
In a large bowl add the cocoa powder to the warm water and carefully stir until smooth.
Beat in the eggs, vegetable oil and vanilla until combined.
Add the wet ingredients into the dry and stir until moistened.
Fill each paper liner 3/4 full and bake for 25-30 minutes.
After a tester comes out clean, remove the cupcakes from the oven and cool completely.
To make the buttercream:
In the bowl of your stand mixer fitted with the paddle attachment beat the butter until fluffy, add the sugar, cocoa, vanilla, salt and milk 1 Tbs at a time until desired consistency.
Frost the cupcakes and serve.
Notes
Recipe adapted from Birthday Cupcakes by Stephanie Greenleigh
Recipe by It Bakes Me Happy at https://itbakesmehappy.com/2012/10/chocolate-cupcakes-with-chocolate-buttercream.html