Preheat and prep: Set your oven to 350°F (175°C).
Line a 12-cup muffin tin with paper liners or lightly grease it.
Combine dry ingredients: In a mixing bowl, whisk 2 cups almond flour, 2 tablespoons coconut flour, 1/2 cup keto granulated sweetener, 2 teaspoons baking powder, 1/2 teaspoon sea salt, and 1 teaspoon ground cinnamon.
Whisk the wet ingredients: In another bowl, beat 3 large eggs. Add 1/2 cup unsweetened almond milk, 1/3 cup melted butter (cooled), 1 teaspoon vanilla extract, and 1 to 1 1/2 teaspoons maple extract (or 2 to 3 tablespoons sugar-free maple syrup). Adjust the maple flavor to taste.
Bring it together: Pour the wet ingredients into the dry.
Stir until just combined. The batter will be thick but scoopable. If it seems too dry, add 1 to 2 tablespoons more almond milk.
Fold in pecans: Gently fold in 3/4 cup chopped pecans.
Don’t overmix, or the muffins can become dense.
Fill the tin: Divide the batter evenly among the 12 cups. For a bakery-style look, add a few extra chopped or whole pecans on top.
Bake: Bake for 18–22 minutes, or until the tops are set and a toothpick comes out clean or with a few moist crumbs.
Cool: Let the muffins cool in the pan for 5 minutes, then transfer to a rack to cool completely. This helps them firm up.
Optional finish: For a light glaze, mix powdered keto sweetener with a few drops of maple extract and a splash of almond milk.
Drizzle over cooled muffins.