This slow cooker apple crisp is an easy fall dessert that's made with tender spiced apples and a buttery oat crumble topping—all cooked right in the crock pot.
To make the topping, stir together flour, oats, sugar, cinnamon, and salt in a medium bowl.
2 tablespoons packed light brown sugar, 1 ¼ cups all-purpose flour, 1 cup rolled oats, 1 teaspoon ground cinnamon, 1/4 teaspoon kosher salt
Add melted butter, and stir until the butter is well-incorporated, and the mixture is crumbly. Set aside.
1/2 cup butter melted
Generously grease a 5-quart+ slow cooker.
To make the filling, combine all the filling ingredients in a large bowl.
1½ pounds Granny Smith apples, 1½ pounds Honeycrisp apples, ½ cup apple cider, 4 teaspoons cornstarch, 2 teaspoons fresh lemon juice, ½ teaspoon apple pie spice, 1/2 cup light brown sugar
Pour into the prepared slow cooker.
Sprinkle the topping evenly over the apples.
Place a thin cotton towel over the top of the slow cooker. Be sure that the towel isn’t touching the heating element.
Cover with the slow-cooker lid.
Cook for 3 hours on low or 1 ½ on high.
Uncover and remove the towel.
Continue cooking, uncovered, until fruit is tender and crisp is set, about 1 hour on low.
Notes
Apples: I've listed my favorite combination of baking apples, but you can use whatever combination of baking apples you prefer. I recommend using a combination of apples for better flavor.
Apple cider: Fresh or shelf-stable apple cider will work.