Stained Glass Window Sugar Cookies

Bahan-bahan (24 porsi)

• 2 and 1/4 cups (281g) all-purpose flour (spooned & leveled), plus more as needed for rolling and work surface
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 3/4 cup (150g) granulated sugar
• 1 large egg, at room temperature
• 2 teaspoons pure vanilla extract
• 15 -20 unwrapped hard candies, such as Jolly Ranchers or Life Savers
• 1 large egg white OR 2 Tablespoons (30ml) water
• 1/3 cup (65g) coarse sugar or sprinkles