Ingredients
Method
- Preheat the oven to 375°F (190°C). Line a baking sheet with parchment paper or a silicone baking mat.
- In a medium bowl, beat the softened butter and 1/4 cup sugar together until light and fluffy. Mix in the egg yolk and vanilla extract until fully combined.
- Add the flour, baking soda, and cream of tartar, and stir just until a soft dough comes together.
- In a small bowl, stir together the remaining 1 tablespoon sugar and the ground cinnamon.
- Shape the dough into 1-inch balls and roll each one in the cinnamon-sugar mixture. Place them 2 inches apart on the prepared baking sheet.
- Bake for 8 to 10 minutes, until the edges are lightly golden but the centers still look soft. Let the cookies cool on the baking sheet for 2 minutes, then transfer them to a wire rack to cool completely.
Nutrition
Notes
Measure the flour by spooning it into a dry measuring cup and leveling it off with a knife; do not scoop or pack it down.
Use butter that is softened but still cool to the touch; it should give slightly when pressed with a finger.
Pull the cookies out when the edges are golden and the centers look slightly underdone, since they will continue to set on the hot pan.
For a stronger cinnamon flavor, add an extra pinch of cinnamon to the coating or increase the total to 1/2 teaspoon.
Check that your baking soda is fresh, as old baking soda can cause the cookies to spread too flat.
Store the baked cookies in an airtight container at room temperature for up to 3 days, or freeze them in a sealed bag for up to 2 months.
