Preheat oven to 350 degrees. Spray a 9 x 9 inch baking pan with nonstick cooking spray.
Pulse the almond flour, flour, 1/4 cup Splenda, and 2 tablespoons butter, and protein powder in a food processor until combined. Add the crumb mixture to a prepared pan and press firmly into the bottom of the pan.
Bake until light golden brown, about 15 to 18 minutes.
While the crust is baking, whisk the eggs with the remaining 1/2 cup Splenda in a medium saucepan. Add the lemon zest and lemon juice, beat for an additional 1 minute. Add remaining 4 tablespoons butter and cook over medium heat stirring constantly until the mixture thickens to a sauce like consistency, about 4 to 6 minutes.
Pour onto the hot crust and bake until the filling is firm but still has a slight jiggle, 10 to 12 minutes.
Cool completely and cut into 9 squares.
0 servings
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.