Preheat oven to 175°C (350°F). Line a muffin tin with parchment liners.
In a large bowl, whisk almond flour, sweetener, baking powder, and salt.
In another bowl, beat eggs, melted butter, almond milk, and vanilla.
Combine wet and dry ingredients, stirring until smooth.
Gently fold in blueberries.
Divide batter evenly between 10–12 muffin cups.
Bake 20–25 minutes until golden brown and a toothpick comes out clean.
Cool slightly before serving.