From The Stir: Recipe A Day
3 Tbsp brown sugar
1 tsp cinnamon
1 cup chopped walnuts
Prepare cake mix per package directions.
For streusel, combine reserved mix with brown sugar, cinnamon, and chopped walnuts.
Pour 2/3 of batter into a 10-inch tube pan. Top with streusel and remaining batter.
Bake at 350°F for 50 minutes.