Prepare coffee cake as directed on package.
Pour all the batter into (8 x 8-inch) baking dish.
Sprinkle all streusel topping on top.
Microwave 7 to 9 minutes on '6', or until wooden pick inserted in center comes out clean, rotating dish once.
Let stand 5 minutes.
For ovens without solid state heat control, Microwave 8 to 10 minutes on 5.