Cinnamon Cookies with Coconut Toffee - SippitySup

Ingredients

• 1 ½ cup unsalted butter (at room temperature, divided)
• 2 ½ cup granulated sugar (divided)
• ¼ cup water
• 1 ½ teaspoon kosher salt
• 1 ½ cup unsweetened flaked coconut
• 1 3/4 cup all-purpose flour
• ½ teaspoon baking powder
• 3 teaspoons ground cinnamon
• 1 large egg (lightly beaten)
• 1 teaspoon vanilla extract
• 3 tablespoons milk (divided)
• turbinado sugar (as needed)