DIRECTIONS:
Step 1
Preheat oven to 400°. Drizzle bottom and sides of pan with oil and use your fingers to coat. Line bottom with a round of parchment paper and smooth to eliminate air bubbles; coat parchment with more oil. Generously sprinkle pan with Swerve and tilt to coat in an even layer; tap out excess.
Step 2
Whisk whole-wheat flour, almond flour, baking powder, baking soda, and salt in a medium bowl to combine and eliminate any lumps.
Step 3
Stir together amaretto, lemon juice, and vanilla in a small bowl.
Step 4
Using an electric mixer on high speed (use whisk attachment if working with a stand mixer), beat eggs, lemon zest, and 1 cup Swerve in a large bowl until mixture is very light, thick, pale, and falls off the whisk or beaters in a slowly dissolving ribbon, about 3 minutes if using a stand mixer and about 5 minutes if using a hand mixer.
Step 5
With mixer still on high speed, gradually stream in 1¼ cups oil and beat until incorporated and mixture is even thicker. Reduce mixer speed to low and add dry ingredients in 3 additions, alternating with amaretto mixture in 2 additions, beginning and ending with dry ingredients.
Step 6
Fold batter several times with a large rubber spatula, making sure to scrape the bottom and sides of bowl. Scrape batter into prepared pan, smooth top, and sprinkle with more Swerve.
Step 7
Place cake in oven and immediately reduce oven temperature to 350°. After about 20 minutes, cover cake with foil. Bake until top is golden brown, center is firm to the touch, and a tester inserted into the center comes out clean, 35-45 minutes. Transfer pan to a wire rack and let cake cool in pan 15 minutes.
Step 8
Poke holes all over top of cake with a toothpick or skewer and drizzle with remaining 2 Tbsp. oil; let it absorb. Run a thin knife around edges of cake and remove ring from pan.
Step 9
Slide cake onto rack and let cool completely.