Peppermint Bark Cookies

Bahan-bahan (3 porsi)

• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 1 cup (200g) granulated sugar
• 1 large egg, at room temperature
• 1 teaspoon pure vanilla extract
• 1 and 1/2 cups (188g) all-purpose flour (spooned & leveled)
• 3/4 cup (62g) unsweetened natural cocoa powder (or dutch process), plus more for rolling
• 1 teaspoon baking powder
• 1/8 teaspoon salt
• 4 4 -ounce (450g or 16 ounces total) white chocolate baking bars, finely chopped
• 1 teaspoon vegetable oil, solid coconut oil, or canola oil
• 3/4 teaspoon peppermint extract
• 1/2 cup crushed candy canes (about 5 candy canes)