Preheat oven to 350 degrees. Line 2 dozen muffin cups with paper liners and set aside.

In a mixing bowl, combine cake mix, sour cream, eggs, oil, coffee granules, and chili pepper. Beat with electric mixer

on low speed to combine. Beat on medium to high for 2 minutes. This will be a thick batter.

In another bowl, toss chocolate chunks with the flour. Fold into the chocolate batter. Spoon evenly into the muffin tins. Bake at 350 degrees for 18 to 22 minutes or until the tops spring back with lightly touched. Cool in the pans on a wire rack for 5 minutes.