Churro Cookies with Chocolate Center and Cinnamon Sugar

Ingredients

• 1 cup unsalted butter, slightly cold
• 1 1/4 cups light or dark brown sugar, packed
• 1/4 cup white granulated sugar
• 1 teaspoon pure vanilla extract
• 2 large eggs
• 2 3/4 cups all-purpose flour
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 teaspoon cornstarch
• 1 1/2 teaspoons ground cinnamon
• 8 ounces semi-sweet chocolate bars, chopped
• 1/2 cup white granulated sugar
• 1 tablespoon ground cinnamon