Preheat your oven to 350°F (175°C).

In a large mixing bowl, beat the softened butter and granulated sugar together until light and fluffy, about 2–3 minutes.

Beat in the egg until fully incorporated.

In another bowl, whisk together the flour, baking soda, ground cinnamon, and salt.

Gradually add the dry mixture into the wet ingredients, mixing on low speed until no flour patches remain.

Use a cookie scoop or your hands to form the dough into 1-inch balls. Roll each ball in the cinnamon sugar mixture.

Place the coated cookie balls on a lined baking sheet, spacing them about 2 inches apart.

Bake in the preheated oven for 10-12 minutes until slightly golden around the edges but still soft in the center.

Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack.