Heat the oven to 375°F.
Line a baking sheet with a Silat or parchment paper.
Peel and dice the apple into small pieces and set them on a kitchen towel or paper towel. I do this so any extra liquid is absorbed.
n a bowl, combine the almond flour, all-purpose flour, salt, baking powder, Ceylon cinnamon, and sugar.
Stir in the egg, oil, almond milk, and vanilla extract and stir until incorporated. Then fold the chopped apple into the wet mixture. Mix until everything is combined. The dough should be very thick, not runny.
Drop 4 spoonfuls onto the baking sheet. Then, split the remaining mixture between the four mounds. Shape the mounds using the back of the spoon so they are slightly domed.
Place the muffin tops in the oven and bake for 20 to 22 minutes at 375°F, until golden.
Let the muffin tops cool completely before removing them from the baking sheet.