Preheat the oven: Set oven to 350°F and line a standard muffin tin with 12 paper liners.
Mix the batter: In a large bowl, whisk together coconut flour, sweetener, baking powder, salt, and spices. Add avocado oil, milk, eggs, and vanilla. Stir until smooth.
Bake the cupcakes: Divide the batter evenly between liners. Bake 20–22 minutes until a toothpick comes out clean. Allow to cool completely.
Make the apple filling: Toss diced apples with lemon juice and cinnamon. In a saucepan over medium heat, melt the butter. Add apples and simmer about 10 minutes, stirring occasionally, until softened and thickened. Stir in the cream and cook another 2–3 minutes. Remove from heat and let cool.
Fill the cupcakes: Cut a small circle out of the top of each cupcake and scoop out the center. Spoon in cooled apple pie filling.
Whip the cream: Beat heavy cream with an electric mixer until stiff peaks form. Sweeten with powdered sweetener to taste.
Assemble: Pipe or spoon whipped cream onto each cupcake, dust with cinnamon, and serve!
Notes
Storage: Keep in the fridge in an airtight container for up to 3 days.Sweetener: Allulose works best for the filling since it caramelizes smoothly without crystallizing.Make ahead: Bake cupcakes and prepare filling a day in advance. Fill and top with whipped cream right before serving.Optional toppings: Try a drizzle of sugar-free caramel or a sprinkle of chopped pecans.