Preheat oven to 400°. Coat cups of muffin pans with cooking spray.
Stir together baking mix and next 5 ingredients in a medium bowl until blended. Spoon batter evenly into prepared muffin pan; sprinkle batter evenly with Streusel Topping.
Bake at 400° for 17 minutes or until a wooden pick inserted in center comes out clean. Cool cakes in pan 10 minutes. Gently run a knife around edges, and remove to wire rack to cool completely.
Microwave white chocolate morsels and cream in a glass bowl at HIGH 30 to 60 seconds or until morsels melt; stir until smooth. Place wire rack with cakes on a large piece of wax paper. Drizzle white chocolate mixture back and forth over tops of cakes with tines of a fork.