peach and raspberry shortbread

Peach and Raspberry Shortbread
1 cup (7 ounces or 200 grams) white sugar
1 teaspoon (5 grams) baking powder
2 3/4 cups plus 2 tablespoons (12 5/8 ounces or 359 grams) cups all-purpose flour (or you can measure 3 cups and remove 2 tablespoons flour)
1/4 teaspoon cinnamon
1/8 teaspoon freshly grated nutmeg
1/4 teaspoon (2 grams) salt
1 cup (2 sticks or 8 ounces or 227 grams) cold unsalted butter
1 large egg
2 peaches, pitted and thinly sliced (between 1/8 and 1/4-inch thick)
Brown your butter: Melt butter in a small/medium saucepan over medium-low heat. It will melt, then foam, then turn clear golden and finally start to turn brown and smell nutty. Stir frequently, scraping up any bits from the bottom as you do. Keep your eyes on it; it burns very quickly after it browns and the very second that you turn around to do something else. Set it in the freezer until solid (about 30 minutes).
Preheat the oven to 375°F (190°C). Butter a 9×13 inch pan, or spray it with a nonstick spray. In a medium bowl, stir together sugar, baking powder, flour, salt and spices with a whisk. Use a pastry blender, fork or your fingertips, blend the solidified brown butter and egg into the flour mixture. It will be crumbly. Pat 3/4 of the crumbs into the bottom of the prepared pan, pressing firmly. Tile peach slices over crumb base in a single layer. Scatter remaining crumbs evenly over peaches and bake in preheated oven for 30 minutes, until top is slightly brown and you can see a little color around the edges. Cool completely in pan before cutting into squares.

from smitten kitchen