Step 1: Craft Your Delightful Cinnamon Swirls
In a small bowl, gently combine the softened butter, brown sugar, and ground cinnamon until it forms a thick, smooth paste. This simple step creates the magic! Roll this mixture into tiny, marble-sized balls (about 1/2-inch in diameter). Place them on a parchment-lined baking sheet and pop them into the freezer for at least 30 minutes until they're perfectly firm.
Step 2: Prepare the Light & Tender Dough
Using a hand mixer or a stand mixer, beat the softened butter and white sugar together in a large mixing bowl until the mixture is beautifully light and fluffy. Next, stir in the eggs and vanilla extract, mixing until everything is well combined. In a separate bowl, whisk together your gluten-free flour, baking soda, sea salt, and cream of tartar. Gradually add these dry ingredients to the wet mixture, mixing on low speed just until a soft dough comes together – avoid overmixing for the best texture! Once your cinnamon marbles are frozen solid, gently fold them into the cookie dough on low speed until they are just distributed throughout.
Step 3: Roll and Sprinkle for Perfection
In a small bowl, mix together the white sugar and ground cinnamon for your inviting coating. Scoop out about 2 tablespoons of cookie dough per cookie and roll it into a neat, round ball. Roll each dough ball generously in the cinnamon sugar mixture until it’s beautifully coated all around. Place the coated dough balls on a parchment-lined baking sheet, making sure to leave about 2 inches of space between each one to allow them to spread perfectly.
Step 4: Bake to Golden Goodness
Preheat your oven to 350 degrees F (175°C). Bake the cookies for 11-12 minutes, or until the edges are just set and turn a lovely light golden color. Remember, they'll continue to set a bit as they cool, so don't overbake! Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Serve them with a tall glass of milk and enjoy this healthier, gluten-free twist on a classic treat!