Preheat oven to 350°F (180°C).In a large mixing bowl, beat softened butter and erythritol together with hand mixer.Add vanilla and salt.Beat in almond flour, adding ~½ – ⅔ cup of flour at a time. (If your mixture isn’t turning into a dough, add 1 Tbsp of butter and adjust to desired consistency. It should hold together when pressed.)
Press into a small glass baking dish (I used a 6x8-inch dish) lined with parchment or foil.
Bake until light golden brown, about 25-30 min.
Remove from oven and allow to cool.
To make your topping, melt chocolate and coconut oil over a double boiler or in the microwave. Stir in peppermint extract.
Spread melted chocolate mixture on top of cooled shortbread and sprinkle with crushed starlight mints.
Refrigerate until set.
Cut into bars, serve, and enjoy!
Yields 12 shortbread bars (depending on size of cut).