1 cup (2 sticks) unsalted butter, at room temperature, cut into pieces
½ cup sugar
1 vanilla bean, scraped, or 1 tablespoon vanilla-bean paste
1½ cups all-purpose flour
½ cup rice flour
Instructions
Position rack in center of oven. Preheat oven to 350°F. Line baking sheet pan with parchment paper.
Cream butter with electric mixer until soft. Add sugar and beat until combined. Beat in vanilla bean or paste. Add flour and rice flour and beat just until combined. Use hands to bring the dough together. Divide dough in half and gently roll each half into a ball on your work surface.
Place the balls, spaced apart, on the prepared pan and press each one into a 7-inch round. Prick several times with a fork. Score each round into 8 wedges with a large chef knife.
Bake for 25 to 35 minutes, or until lightly browned. Cut through the scored lines while still warm. Cool completely on rack. Shortbread may be stored in airtight container at room temperature for up to 1 week.
Recipe by Bakepedia at https://www.bakepedia.com/vanilla-bean-shortbread-recipe/