Step 1

Preheat oven to 350° F. Grease bottom of 13 x 9-inch baking pan.

Step 2

Combine 2/3 cup oats6 tablespoons flour4 tablespoons butter and 3 tablespoons brown sugar in small bowl. With clean fingersmix until crumbly; set aside.

Step 3

Combine 2 1/4 cups flour1 cup oatsbaking powder and salt in large bowl. Combine 1 cup brown sugar and eggs with wire whisk. Whisk in 1 1/4 cups milkmelted butter and vanilla extract. Add to flour mixture all at once; add apples. Stir gently until just combined. Pour into pan. Sprinkle with 1 cup morsels; crumble topping evenly over morsels.

Step 4

Bake for 40 minutes or until golden brown and wooden pick inserted in center comes out with a few moist crumbs clinging to it. Remove from oven to wire rack.

Step 5

Microwave remaining 1/3 cup morsels and 1 1/2 teaspoons milk in smalluncoveredmicrowave-safe bowl on MEDIUM-HIGH (70%) power.The morsels may retain some of their original shape.If necessarymicrowave at additional 10- to 15-second intervalsstirring just until smooth.Carefully drizzle over hot cake in pan. Cool in pan at least 30 minutes. Cut into squares; serve warm or at room temperature with ice creamif desired. Store tightly covered at room temperature.