As is true with most baking endeavors, Betty Crocker has a packaged mix you can buy for that! It makes cupcakes stuffed with Reese's pieces so you can be the expert baker you've always dreamed of being. Betty Crocker Reese's Surprise Cupcake Kit Betty Crocker target.com $4.99 BUY NOWThe baking mix, aptly named the Reese's Pieces Surprise Cupcake Kit, includes all of the dry ingredients needed to achieve a fluffy cupcake filled with Reese's pieces that tumble out when you take a bite. Every box has orange Reese's pieces, chocolate cupcake mix, green frosting, and paper baking cups packed up so you don't have to worry about buying anything else at the store. When the hole is cut, put about five Reese's pieces inside and replace the cupcake piece that you cut out.