Ingredients:

• 1 3/4 cups (230g) all-purpose flour
• 3/4 cup (150g) granulated sugar
• 1/2 teaspoon kosher salt
• 1/4 teaspoon ground cinnamon
• 1 1/2 sticks (12 tablespoons) cold unsalted butter, cubed, plus more for the pan
• 2 teaspoons vanilla extract
• 1 large egg
• 1/4 cup sour cream
• 1/2 cup (100g) granulated sugar
• 1 tablespoon all-purpose flour
• 2 teaspoons vanilla extract
• 1/4 teaspoon ground cinnamon
• 1/4 teaspoon kosher salt
• 3 medium peaches (about 1 pound), pitted and sliced thinly