A rich Chocolate Crumb Cake is made with a cake mix and loaded with chocolate crumb topping for the ultimate breakfast or desert.
Preheat oven to 350 degrees and spray a 9x13 pan with non-stick spray {set aside}.
Combine the chocolate cake mix, eggs, water, melted butter and sour cream in a medium bowl and mix until everything is combined well. {I used a hand held mixer} Pour batter into prepared 9x13 pan and spread into an even layer.
In a small bowl combine all of the crumb mixture ingredients. Work the mixture together into small crumbs using a pastry blender {or fork}. Don't over work the mixture or you will get a paste and it will change the texture. Sprinkle the crumbs in an even and thick layer over the top of the chocolate cake batter. Bake for 35-40 minutes.
Remove your Chocolate Crumb Cake from the oven and serve warm or let the cake cool completely and cover. Cake will stay moist for 3 days at room temperature or 4-5 in the refrigerator. It also freezes for up to 3 months.