Preheat your oven to 350°F (175°C).
Prepare the muffin tin by lining it with paper liners or greasing it with cooking spray.
In a large mixing bowl, combine the almond flour, erythritol, baking powder, and salt. Mix thoroughly.
In another bowl, whisk together the eggs, almond milk, melted coconut oil, and vanilla extract until well combined.
Pour the wet ingredients into the dry ingredients and stir gently until just combined. Fold in the blueberries.
Divide the batter evenly among the muffin cups, filling each about ¾ full. Bake for 20-25 minutes.
Allow the muffins to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.