Peanut Butter chip Brownie Cupcakes are a wonderful comingling of chocolate and peanut butter. If you like peanut butter cups, you will love these treats. With a whole cup of butter and 4 eggs though, get ready for a rich dessert. The ¾ cups of unsweetened cocoa powder coupled with the 2 cups of white sugar balance the scales though making it as sweet as it is rich. No frosting needed for this cupcake, all the flavor is already there.
Source Recipe Girl