Langkah 3
In a different small bowl, mix together the cocoa powder, vanilla extract, and red food coloring to make a thick paste. (The amount of Red Food Coloring you use is up to you, if you like a bright red use less, if you like a deeper earthy color use 3 tablespoons, but no more.) Add to the batter and mix on medium speed until completely combined. Scrape the bottom of bowl if necessary to ensure all the batter gets color.