6tablespoonssalted butterchilled and cut into small dice
⅔cupall-purpose flour
½cupsugar
¼cupchopped almonds
1teaspoonground cinnamon
Instructions
Preheat the oven to 350 degrees F.
Spray an 8 X 8 inch pan (or 9 X 9 inch) with non-stick spray then layer with parchment paper so it hands over at least two edges of the pan and fits tightly into the corners.
Whisk the flour baking powder, cinnamon, cream of tartar and salt in a medium size bowl and set aside.
Beat the brown sugar and butter in the bowl of a stand mixer. Add the eggs and vanilla and mix until well combined. Add the dry ingredients and mix until incorporated. Add the apple and nuts and mix on low for 2-3 turns. Spread the batter in the prepared pan.
Add all of the ingredients for the strudel to the bowl of a food processor and pulse to mix. Sprinkle evenly over the top of the batter.
Bake for 40-45 minutes or until the top is lightly golden and a toothpick inserted into the center of the pan comes out clean. Allow to cool completely then pull out of the pan by holding onto the parchment overlap. For extra clean cuts, use a large knife or pizza cutter.
** If you are baking at less than 3,500 ft., use 1 ½ cups flour, 1 teaspoon baking powder and 1 ⅔ cup sugar.