Gluten Free Butter Cookies

This is one of my recipes that is a result
of experimenting with all kinds of cookie recipes,
combining things I liked and then patiently
changing the resulting recipe slightly,
time after time until it met my expectations.

Ingredients:
1 cup rice flour
2/3 cup cornstarch
1 1/3 cups almond flour
1/4 cup teff flour
1 1/3 cups cane sugar
1/2 cup coconut flour
200 g butter
2 teaspoons vanilla sugar
1/4 teaspoon salt
2 teaspoons xanthan gum
4 egg yolks

Directions:
Preheat oven to 350 degrees F.
In a large bowl sift rice flour,
corn starch, almond flour and teff.
Grind coconut flour with cane sugar until fine,
add to flour mixture.
Add xanthan gum, salt and vanilla sugar and
mix all ingredients well, using a wire whisk.
Cut in butter and egg yolks and knead
until you have a nice supple dough.
Shape cookies the way you prefer.
Place cookies on a greased cookie sheet
or silpat leaving 1/2 inch in between.
Bake for about 15-20 minutes,
remove from oven when they start
to just turned slightly golden.