Prepare the Cake Batter: Preheat oven to 350 degrees F (175 degrees C). Beat butter until light and fluffy in a large bowl. Add eggs one at a time, then blend in almond milk and vanilla extract.
Combine Dry Ingredients: Combine almond flour, coconut flour and baking powder in a bowl. Slowly add to the wet mixture and mix well.
Bake the Cake: Pour into greased cake pans and bake for 25–30 minutes or until golden. Cool them completely on a rack.
Make the Chantilly Cream: Beat heavy cream, mascarpone and powdered sweetener until soft peaks form.
Assemble the Cake: Slice cooled cake and layer between and top with Chantilly cream and berries. Chill before serving.