Step 1

In a medium bowl, combine all-purpose flour, oat flour, baking soda, salt and cinnamon, whisking everything together until combined.

Step 2

In a large bowl, whisk melted butter together with both brown and granulated sugar until fully incorporated, then mix in eggs, lemon juice and vanilla extract.

Step 3

Once smooth, stir in dry ingredients, being careful not to over-mix, then fold in chocolate chips and walnuts.

Step 4

Scoop 2-3 tablespoons cookie dough onto 2, parchment-lined baking sheets and chill for at least 1-2 hours or up to 24 hours.

Step 5

Remove from fridge, gently flatten cookies with your palm.

Step 6

Preheat oven to 350º F and space cookies out on baking sheet so they’re at least 1 1/2 inches apart.

Step 7

Place baking sheets in oven and bake for 13-15 minutes (if on the smaller side; 10-12 minutes if smaller), or until golden. They should still be soft in the centers.

Step 8

Remove from oven and let cool at least 15 minutes before serving. Enjoy!