Soften the butter at room temperature. If desired, you can even melt the butter to make it easier to work with.
Beat the butter with the sweeteners until combined.
Mix in the almond flour, coconut flour, vanilla, and salt.
Stir in the chocolate chips, walnuts (if using), and 2 tablespoons milk.
Add more milk, 1 teaspoon at a time, if needed to reach a cookie dough consistency.
Get out your spoon and dive in!
