In an electric mixer beat the butter and sugar until light and fluffy, 2-3 minutes.
Add egg yolk and vanilla, mix until combined.
On low speed gradually add the dry mixture just until combined. Transfer the dough to a lightly floured surface and shape into a ball. Divide the dough in half onto 2 pieces of wax paper/parchment. Flatten each one into a disk. Cover with the waxed paper and refrigerate for 30 minutes or overnight.
Preheat oven to 350Β°F and prepare baking sheets.
Gently roll out dough to ΒΌ-inch thickness, sprinkling with flour only when needed.*
Cut shapes and transfer cookies to baking sheets. Refrigerate 10-15 minutes before baking.
Gather remaining pieces of dough from cut cookies, gather into dough ball and repeat as before. Refrigerate dough 10-15 minutes before rolling out again.
Bake cookies in preheated oven for 12-14 minutes or until just turning golden on the edges.
Allow to cool on the baking sheet for 2-5 minutes before transferring to wire racks to cool completely.
Decorate as desired. Store cookies in an airtight container.
Notes
Tips for working with gluten free dough:
Chill the dough anytime it is too soft to work with.
Minimize the need for extra sprinkling flour by using plastic wrap or wax paper on both sides of the dough. Gently peel back the paper and sprinkle with a small amount of flour as needed. You need to peel off the paper without it sticking and then transfer the cut shapes to the baking sheet. If the dough is sticking chill it again.