3-4medium appleschopped (peel or no peel -- up to you!) - about 1 lb or 3 cups chopped
Line an 8x8" pan with parchment paper and spray with non stick spray. Preheat oven to 350 degrees F.
For the blondies:In a large bowl, melt the butter. Stir in sugar. Stir in remaining ingredients (through flour). Spread into prepared pan.
Bake 15 minutes while you preparing the topping.
For the topping:Combine apples, brown sugar, flour, and cinnamon in the same bowl you used to make the blondies. Microwave for 5 minutes on high. Stir and set aside.
In a separate bowl, combine butter, brown sugar, oats, flour and cinnamon until crumbly (I use my fingers, but you could use a fork or pastry cutter).
When blondies have baked 15 minutes, spread with apples, and top the apples with the streusel. Press down gently. Bake another 18-20 minutes.
Place on a wire rack and cool to room temperature, then chill in the fridge for at least 2-3 hours before removing from the pan and slicing.
*For these photos I made a simple glaze to drizzle over. Simply combine 1 tablespoon milk with 1/4 teaspoon cinnamon, and stir in 1 tablespoon of powdered icing sugar at a time until you reach desired consistency (I used 4 tablespoons).