Heat oven to 350. Grease and flour a square 8 x 8 inch pan or a round layer pan, 9 inches. Pour prepared velvet crumb batter into prepared pan. Bake about 35 minutes or til top springs back when touched lightly. While warm, top with broiled macadamia topping.
For topping, mix all ingredients. Spread on warm cake. Set oven control to broil and/or 550. Place cake 3 inches from source of heat. Broiler til nicely browned, about 3 minutes.