FOR THE CINNAMON-SUGAR: – 1/4 cup (50g) granulated sugar – 1 tablespoon ground cinnamon FOR THE COOKIES: – 3 cups (360g) all-purpose flour – 1 teaspoon baking soda – 1/2 teaspoon cream of tartar – 1/2 teaspoon ground cinnamon – 1/2 teaspoon salt – 1 cup (226g) unsalted butter, softened – 1 cup (200g) firmly packed light brown sugar – 1/2 cup (100g) granulated sugar – 2 large egg – 1 teaspoon vanilla extract – 8 to 12 ounces (226 to 340g) white chocolate – chopped nuts, toffee bits, toasted coconut, sprinkles, etc. for garnish