In a large bowl, whisk together almond flour, coconut flour, whey protein, and baking powder.
In another large bowl, beat butter until smooth. Beat in granulated sweetener, lemon zest, and lemon extract until well combined.
Beat in eggs, then half of almond flour mixture. Then beat in almond milk. Finally beat in remaining almond flour mixture.
By Carolyn Ketchum of All Day I Dream About Food