You probably need to find a recipe for chocolate cake. This recipe is very vanilla, so I’m not sure how much cocoa powder you would need to add. My favorite chocolate cupcake recipe is by Hershey’s. You can see it here in the Cupcake section of this recipe: https://www.leah-claire.com/2012/03/blackberry-chocolate-cupcakes.html. Vanilla bean paste is the same measure for measure with vanilla extract or a vanilla bean. One teaspoon of vanilla bean paste equals one vanilla bean or one teaspoon of vanilla extract. Hope this helps!

I did! I use vanilla bean paste a lot in recipes instead of extract. It’s the same measurement.