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Export 14 ingredients for grocery delivery
Preheat the oven to 350 degrees. Spray or line a standard muffin tin.
Add cake mix to a large mixing bowl. Using a hand or stand mixer, add in your oil, eggs, and soda, and mix on medium until well incorporated. Mix in 1 cup of cocoa powder.
Add batter into the muffin tin until each is about 2/3 full. Bake for 18-20 minutes, or until a toothpick comes out clean. Allow to cool completely before frosting.
In a large mixing bowl, using an electric hand or stand mixer, cream the butter, and beat until light and fluffy (about 2 minutes).
Mix in the cocoa powder and chocolate syrup.
Mix the half and half or milk and Dr. Pepper soda together. (If you don’t, the soda on its own will break your frosting)
Slowly mix in the powdered sugar, 1 cup at a time, while adding a bit of the liquid mixture from Step 6 in between each cup. Continue to mix for 1-2 minutes or until creamy, but don’t over mix!
Prepare a piping bag and fill the bag with frosting and frost your cupcakes. Add your red sanding sugar and straw if desired. Enjoy! Makes 24 cupcakes.