Preheat your oven to 350°F (175°C).

Grease and flour a cake pan.

In a bowl, mix the almond flour, coconut flour, baking soda, and salt.

In a separate bowl, cream the butter and sugar until light and fluffy.

Add the eggs one at a time, beating well after each addition.

Stir in the vanilla extract.

Gradually mix the dry ingredients into the wet ingredients until well combined.

Pour the batter into the prepared cake pan and smooth the top.

Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.

Let the cake cool in the pan for 10 minutes, then turn out onto a wire rack to cool completely.