Ingredients
1 cup light brown sugar, firmly packed
1/2 cup granulated sugar
1/2 tsp salt
1 1/2 tsp cinnamon
1 cup unsalted butter, melted
2 1/2 cup all-purpose flour
3 cup granny smith apples, chopped, unpeeled
1 tsp cinnamon
2 1/2 cup all-purpose flour
3/4 tsp baking powder
1 tsp baking soda
1/2 tsp salt
3/4 cup unsalted butter, softened
1 1/2 cup granulated sugar
2 large eggs
1 1/4 cup plain greek yogurt
1 tsp vanilla extract
Preparation
Pre-heat oven to 350 degrees. Grease a 13x9 glass baking dish with butter or non-stick cooking spray; set aside.
In a medium bowl, stir together sugars, salt and cinnamon. Whisk in melted butter. Stir in flour until it is completely absorbed. Spread topping mix out on a large sheet of parchment paper and set aside.
Prepare cake. In a medium bowl, combine chopped apples and cinnamon; set aside. In a separate medium bowl, sift together flour, baking powder, baking soda and salt; set aside. In the large bowl of an electric mixer, beat butter until smooth and creamy.
Scrape the sides of the bowl with a spatula and add the granulated sugar. Beat for several minutes until light and fluffy. Scrape the sides of the bowl with a spatula again and then add the eggs, one at a time, mixing on medium speed in-between.
Beat just until incorporated. Scrape the bowl again and add yogurt and vanilla and mix on medium speed just until combined.
Add 1/3 of the dry ingredients and stir on low speed just until combined. Repeat with remaining dry ingredients in two parts. Do not over-mix. Remove bowl from mixer and fold in apples.
Spread bake layer in prepared baking dish. Drop chunks of the topping over cake layer until completely covered with a thick layer of topping.
Bake for about 55 minutes or until a knife or toothpick comes out clean from center. If topping starts to brown too much while cooking, lightly cover with a layer of tin foil and continue to bake as directed.
