Follow these easy steps to create your Apple Bubble Up Casserole:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C).

2. Prepare Baking Dish: Grease a 9×13-inch baking dish with cooking spray or butter.

3. Chop Apples: Peel and chop the apples into bite-sized pieces, and place them in a bowl.

4. Mix Sugar and Cinnamon: In a separate bowl, combine the granulated sugar and ground cinnamon. Mix well.

5. Coat Apples: Add the chopped apples to the sugar and cinnamon mixture, tossing to coat evenly. Let them sit for a few minutes to absorb the flavors.

6. Prepare Biscuit Dough: Open the can of biscuit dough and separate the biscuits. Cut each biscuit into quarters.

7. Combine Ingredients: In a large bowl, combine the biscuit pieces with the coated apples.

8. Add Butter and Vanilla: Drizzle the melted butter over the mixture and add the vanilla extract. Stir gently to combine everything thoroughly.

9. Transfer to Baking Dish: Pour the mixture into the prepared baking dish, spreading evenly.

10. Bake: Place the dish in the preheated oven and bake for 30-35 minutes, or until the top is golden brown and bubbly.

11. Cool Slightly: Once baked, remove from the oven and let it cool for a few minutes before serving.

With these straightforward steps, you can enjoy a warm, delicious Apple Bubble Up Casserole that will have everyone asking for seconds.