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'.