1 stick Earth Balance vegan butter

3/4 cup organic sugar (you can use coconut sugar, but it will darken the cookies)

1 large egg

2 teaspoons Gefen Pure Vanilla Extract

2 and 3/4 cups oat flour (certified gluten-free)

1/2 teaspoon Haddar Baking Powder

1/4 teaspoon fine sea salt

3 and 1/2 cups organic powdered sugar

2 sticks Earth Balance at room temperature

1 drop of natural blue food coloring (to whiten the buttercream cream)

1 teaspoon lemon juice

1 teaspoon Gefen Lemon Extract

1 to 2 tablespoons cashew milk (if needed, to make more liquidy)