01 - Preheat oven to 350°F and line a baking sheet with parchment paper.
02 - In a large bowl, whisk together almond flour, erythritol, cinnamon, ginger, nutmeg, salt, and baking powder until well blended.
03 - In a separate bowl, beat the egg, then whisk in melted butter and vanilla extract until smooth.
04 - Pour the wet ingredients into the dry ingredients and mix until a cohesive dough forms.
05 - Fold in the chopped walnuts until evenly distributed throughout the dough.
06 - Scoop tablespoon-sized portions of dough, roll into balls, and place on the prepared baking sheet about 2 inches apart. Flatten each slightly with your fingers or a fork.
07 - Bake for 13 to 15 minutes, or until edges are golden brown.
08 - Let cookies cool on the sheet for 5 minutes, then transfer to a wire rack to cool completely before serving.