Step 1

Prep: Preheat the oven to 350F. Grease a 10” cast iron skillet (or similar sized pan) with butter or cooking spray and set aside.

Step 2

Make the Crumble: Add the flour, oats, brown sugar, cinnamon, and salt to a small bowl and mix well with a fork. Pour the melted butter over the flour mixture and mix until evenly combined.

Step 3

Fruit Filling: Add the blueberries, apples, flour, sugar, cinnamon, vanilla, lemon juice, and salt to the prepared cast iron pan. Mix well with a spatula until combined, then spread out to form an even layer across the bottom of the pan.

Step 4

Assemble: Use your hands to crumble the crumble evenly over the fruit, leaving some pieces bigger and some smaller.

Step 5

Bake: Bake in the middle rack of the oven for 45 to 50 minutes, until the fruit is bubbly and the crumble has browned. Let sit for 10 to 15 minutes to set.

Step 6

Serve: Serve warm topped with vanilla ice cream, or as desired. Store any leftovers in the refrigerator for up to 5 days.