Preheat your oven to 350°F (175°C). Gather the sliced apples and place them in a mixing bowl.
4 cups tart apples, sliced
Toss the apple slices with cinnamon and nutmeg until evenly coated. Transfer the apple mixture into a baking dish, spreading it out into an even layer.
1 teaspoon cinnamon, 1/4 teaspoon nutmeg
In a separate bowl, combine almond flour, sliced almonds, and erythritol. Add melted butter and stir until the mixture resembles coarse crumbs. This will be the topping.
1 cup almond flour, 1/2 cup sliced almonds, 1/3 cup granulated erythritol, 1/4 cup unsalted butter, melted
Sprinkle the crumb topping evenly over the apples in the baking dish, covering the fruit completely.
1 cup almond flour, 1/2 cup sliced almonds
Bake in the preheated oven for about 30 minutes, or until the topping is golden brown and the apple filling is bubbling around the edges. You should hear gentle bubbling and observe a crispy, golden crust.
Allow the apple crisp to cool slightly before serving. Serve warm, optionally topped with keto-friendly whipped cream or vanilla ice cream for added richness.
