Preheat Oven to 375
Grease 9x12 inch pan at least 2 inches deep with butter
In a cake mixer place butter, Lakanto, lemon extract and vanilla extract and mix for 2 minutes
Add eggs
In a separate bowl mix the almond flour, baking powder and salt
Using your cake mixer on low add the dry mixture until smooth
By hand add 1 1/2 cups of the blueberries
Gently pour the batter in the pan
Bake for 15 minutes
Remove and add the remaining 1/2 cup blueberries by sprinkling it over the top of cake
Put back in oven for 45 minutes until golden brown and a knife in the center comes out clean
Remove from oven and let cool one hour before serving