Double Chocolate Cupcakes

With or without frosting, these easy cupcakes will grant their maker the title of professional baker.
Ingredients:
Dry ingredients:
2 cups cake mix
1/2 cup cocoa powder
1/2 cup chocolate chips
Wet ingredients:
1 cups white sugar
1/2 cup soft butter, vegetable oil or shortening
2 eggs
1 tsp vanilla
1 tsp instant coffee dissolved in 1 tbs hot water
1 cup milk

Directions:
Preheat oven to 350°. Line the muffin tins with paper cupcake liners.
Combine the dry ingredients in a mixing bowl.
In a stand mixer, beat sugar and butter until fluffy (about 4 minutes). Adding one egg at a time; stir in flour alternating with milk and coffee and ending with flour. Fold in chocolate chips and vanilla extract. Pour cake batter 3/4 full into each cupcake liner and bake in oven for 30 minutes.