01 - Preheat the oven to 350°F. Line a baking sheet with parchment paper.
02 - Melt butter in a small saucepan over medium heat. Cook, stirring occasionally, until golden brown with a nutty aroma, about 4–5 minutes. Remove from heat and cool for 5 minutes.
03 - In a large bowl, whisk together almond flour, sweetener, sea salt, and baking powder until well blended.
04 - Add cooled browned butter, egg, and vanilla extract to the dry ingredients. Mix until a soft, uniform dough forms.
05 - Fold in sliced almonds and sugar-free chocolate chips if desired.
06 - Scoop tablespoon-sized portions onto the prepared baking sheet, spacing 2 inches apart. Gently flatten each cookie with your fingers or the back of a spoon.
07 - Bake for 12–15 minutes until edges are golden brown. Centers may appear slightly soft.
08 - Let cookies rest on the baking sheet for 10 minutes, then transfer to a wire rack to cool completely.