Preheat oven to 180°C (350° F).

 In a bowl, whisk eggs, tahini, vanilla extract, milk and brown sugar.

Add almond flour, oat flour, baking soda and mix until well-combined. Add chocolate chips and mix.

Pour the batter into greased pan (or lined with parchment paper) and spread evenly.

Bake for 25 minutes. Let it cool before cutting into squares. Store in the fridge for up to 5 days or in the freezer for few weeks.