Maple Walnut Shortbread Bars recipe for managing PCOS and pregnancy on Fertility Chef

Ingredients

• 2 sticks (16 tablespoons) unsalted butter, cut into chunks, at room temperature, plus more for pan
• 1/2 cup sugar
• 1 large egg yolk
• 2 tablespoons real maple syrup
• 1 teaspoon vanilla extract
• 1 vanilla bean, split and scraped, optional
• 1 3/4 cups all-purpose flour, plus more for working with dough
• 1/4 cup rice flour
• 1/4 teaspoon fine sea salt
• 1 1/2 cups coarsely chopped toasted walnuts