Preheat the oven to 350°F. Line a 9x13-inch pan (with straight sides) with parchment paper. Set aside. In a large mixing bowl or the bowl of a stand mixer, beat the softened butter and granulated sugar until light and fluffy. 1 cup unsalted butter, 1 ½ cups granulated sugar
Beat in the egg, egg yolk, vanilla extract and almond extract until well combined.
1 large egg, 1 large egg yolk, 2 teaspoons vanilla extract, ½ teaspoon almond extract
Whisk together the flour, baking powder and salt in a separate bowl.
2 ½ cups all-purpose flour, ½ teaspoon baking powder, ½ teaspoon fine sea salt
Add the dry ingredients to the wet ingredients, mixing until just combined.
Spread the cookie dough evenly into the prepared baking pan using your hands, offset spatula or spatula.
Bake for 20 to 25 minutes, or until the edges are lightly golden and a toothpick inserted into the center comes out with just a few moist crumbs.
Allow the bars to cool completely in the pan.