Preheat the oven to 350F. Line a muffin pan with muffin liners. (You will only need 10.)
In a large bowl, add almond flour, erythritol, baking powder and salt. Whisk until evenly combined.
Add in melted butter, milk, lemon juice, eggs, lemon zest and vanilla. Whisk until smooth.
Add in half of the blueberries. Gently stir until they are evenly distributed into the batter.
Using an ice cream scoop, scoop batter into prepared muffin pans. The batter should reach close to the top of each muffin liner. Add remaining blueberries to the tops of each muffin, pushing them very gently so they that the bottom 1/3 of the berries get pushed into the batter.
Bake for about 25 minutes or until tops start to turn golden brown and toothpick inserted comes out clean.
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.