Prep your pan and oven: Preheat the oven to 350°F (175°C).
Line a 12-cup muffin tin with paper liners or lightly grease with coconut oil spray.
Mix the dry ingredients: In a large bowl, whisk together almond flour, coconut flour, baking powder, salt, and granulated sweetener until no lumps remain.
Whisk the wet ingredients: In a separate bowl, beat the eggs. Whisk in melted butter, almond milk, vanilla, and lemon zest until smooth.
Combine: Pour the wet mixture into the dry mixture. Stir gently with a spatula until just combined.
The batter should be thick but scoopable.
Fold in strawberries: Add the diced strawberries and fold carefully so they’re evenly distributed without crushing them.
Fill the muffin cups: Divide the batter among the 12 cups, filling each about 3/4 full. If using, sprinkle a pinch of coarse keto sweetener on top for a bakery-style finish.
Bake: Bake for 18–22 minutes, or until the tops are set and a toothpick comes out clean or with a few moist crumbs. Watch for light golden edges.
Cool: Let the muffins cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.
This helps them set and prevents crumbling.
Optional glaze: If you want extra sweetness, mix 1/3 cup powdered keto sweetener with 1–2 teaspoons lemon juice and drizzle over cooled muffins.