Preheat oven to 375° F. Grease 9-inch-square baking pan.
Combine nuts, 1/2 cup granulated sugar, brown sugar, 1/4 cup flour, 1 teaspoon cinnamon and 6 tablespoons butter in medium bowl. Mix with fork until mixture resembles coarse crumbs.
Whisk together water and Coffee mate Original Flavor Powder in small bowl until smooth. Combine remaining 2 cups flour, remaining 1/2 cup granulated sugar, baking powder, salt, remaining teaspoon cinnamon and 1/3 cup butter in large mixer bowl. Beat by hand or on low speed with an electric mixer until flour is coated with the butter. Stir egg into butter-flour mixture. Gradually stir in Coffee mate mixture.
Spoon half of batter into prepared pan. Sprinkle half of crumb topping over batter; spoon remaining batter over crumb topping. Sprinkle with remaining crumb topping.
Bake for 30 minutes or until wooden pick inserted near center comes out clean. Cool in pan on wire rack for 15 minutes before cutting. Best served warm.