Thinly sliced Granny Smith apples baked with a cinnamon glaze and oatmeal crumb topping to make the BEST Apple Crisp!

For the crumb topping:
1/2 cup all-purpose flour
1/2 cup old-fashioned rolled oats
1/2 cup light brown sugar
1/2 teaspoon baking powder
1/4 teaspoon ground cinnamon
dash of salt
1/3 cup unsalted butter, cut into small pieces

For the Apple filling:
3-4 large Granny Smith apples, peeled and thinly sliced
3 Tablespoons butter, melted
2 Tablespoons all-purpose flour
1 Tablespoon lemon juice
3 Tablespoons milk
1/2 teaspoon vanilla extract
1/4 cup light brown sugar
1/2 teaspoon ground cinnamon
dash of salt

For serving (optional)
vanilla Ice Cream
Homemade Caramel Sauce

Instructions
Preheat oven to 375 degrees F.

For the topping:
In a medium size bowl combine the crumb topping ingredients with a fork or pastry blender until it resembles small crumbs. Refrigerate while you prepare the apple filling.

For the Apple Filling:
(I peel and slice the apples all at once. It makes the process a lot faster!) In a small bowl, combine melted butter and flour until well blended. Add lemon juice, milk and vanilla and stir well. Stir in brown sugar, cinnamon, and salt.

Pour butter mixture over apples and toss to coat. Pour apple mixture into an 8×8-inch baking dish and spread into an even layer. Sprinkle crumb topping evenly over the apples.

Bake for 30-35 minutes or until golden brown and top is set. Remove from oven and allow to cool for at least 10 minutes before serving.

Serve with Vanilla Ice Cream and homemade caramel sauce, if desired.

Notes
Make Ahead Instructions: Make the apple filling as instructed but add an extra splash of lemon juice to keep the apples from turning brown. Store in an air-tight container, in the fridge, for up to one day. Make the crumble topping and store separately in the fridge.
Freezing Instructions: Prepare and bake the apple crisp as directed. Cool completely, then cover with a double layer of aluminum foil. Freeze for up to 3 months. Thaw overnight in the refrigerator, then warm in a 350°F oven for 20-25 minutes or until heated through.