In a large mixing bowl, add butter and erythritol. Cream together until light and fluffy. Add in lemon zest and lemon juice and mix until incorporated. Using a spatula, scrape down the sides of the mixing bowl.
Add in almond flour and mix in slowly until completely incorporated and a dough forms.
Place dough between two sheets of parchment paper. Roll out the dough until it is 3/8 inch thick. Place dough into the fridge and let it firm up for at least 30 minutes. The dough does not need to be completely chilled, just firm enough that you will be able to cut and move the cookies.
While waiting for the dough to chill, preheat oven to 350°F. Line a baking sheet with parchment paper.
After 30 minutes, remove dough from fridge. Slice into rectangles approximately 2 inches by 1.5 inches. Carefully peel cookies from parchment paper and place onto prepared baking sheet, spacing cookies about 1 inch apart. Reroll dough scraps and repeat.
Bake cookies about 15 minutes or until edges turn light brown.
Let cookies cool completely on baking sheet to let them set. Cookies will firm up as they cool. Do not remove cookies until they are set.
Notes
You will not use the entire lemon but one lemon should be enough to produce 1/2 tbsp lemon zest and 1 tsp lemon juice.
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Estimated nutrition provides total carbs, carbs from erythritol and net carbs. The net carbs count excludes fiber and carbs from erythritol. If you are on a keto diet, please remember to look at net carbs and not just total carbs.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.