Add all ingredients to a blender.
Blend until completely smooth, about 30-45 seconds.
Taste for sweetness and lemon flavor; add lemon extract if needed, then blend again for 20 seconds.
Pour into your Ninja Creami pint, staying below the max fill line.
Freeze for a full 24 hours. A partial freeze will result in a crumbly or uneven texture.
Process on the Lite Ice Cream function.
Check the texture after the first spin. If it comes out crumbly or powdery, add 2 tbsp of almond milk or cream directly into the pint and respin.
