Preheat oven to 350°F (175°C) and line a 12-cup muffin tin with paper liners.
In a large bowl, whisk together almond flour, erythritol, baking powder, and salt.
In a separate medium bowl, beat the eggs then whisk in coconut oil, almond milk, and vanilla extract.
Pour the wet ingredients into the dry ingredients and stir until just combined.
Gently fold in the blueberries.
Divide the batter evenly among the 12 muffin cups.
Bake for 20 to 25 minutes or until the tops are golden brown and a toothpick comes out clean.
Cool in the pan for 10 minutes before transferring to a wire rack.