Delight in the Chewy Texture of Furry Monster Cookies (Soft Blue Cookies)

Ingredients

• 3/4 cup (170 g) unsalted butter, softened
• 3/4 cup (150 g) packed light brown sugar
• 1/3 cup (65 g) granulated sugar
• 1 large egg, room temperature
• 1 large egg yolk, room temperature
• 2 teaspoons vanilla extract
• 1-2 teaspoons royal blue gel food coloring
• 2 1/3 cups (280 g) all-purpose flour
• 1 tablespoon cornstarch
• 1/2 teaspoon baking soda
• 1/2 teaspoon baking powder
• 1/2 teaspoon fine salt
• 8 Oreo cookies, chopped
• 1/2 cup (85 g) semi-sweet chocolate chips
• 1/2 cup (85 g) white chocolate chips
• 12 whole Oreo cookies, for stuffing
• 1 cup (85 g) sweetened shredded coconut
• 1/2 teaspoon royal blue gel food coloring, plus more as needed
• 3/4 cup (90 g) powdered sugar
• 1-2 tablespoons milk
• 1/2 teaspoon vanilla extract
• 24 candy eyes, optional