Melt the butter in the microwave.
Add almond flour and erythritol to a large bowl and mix well.
Pour in the melted butter and mix until it forms a cohesive dough.
Press the dough evenly into a baking pan.
Bake in a preheated oven at 180°C (356°F) for 15 minutes.
Let it cool completely, then cut into desired sizes.