Step 1

Preheat the oven to 325ºF and butter a 9x5 inch metal loaf pan very well. Sprinkle the sides and bottom of the pan with sliced almonds, pressing into the butter to help it adhere.

Step 2

In a medium bowl, whisk together the almond flour, protein powder, baking powder, and salt. Set aside.

Step 3

In a large bowl, beat the butter until smooth. Add the sweetener and beat until lightened and well-combined, about 2 minutes. Beat in the eggs, one at time, scraping down the beaters and sides of bowl with a rubber spatula as needed. Beat in the almond extract.

Step 4

Beat in half of the almond flour mixture, then beat in the almond milk. Beat in the remaining almond flour mixture until well combined. Spread the batter in the prepared pan, being careful not to dislodge the sliced almonds on the sides. Smooth the top.

Step 5

Bake 50 to 60 minutes, or until the top is deep golden brown and just firm to the touch. Let cool 30 minutes in the pan before flipping out onto a wire rack.