Preheat and prep: Heat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone baking mat. This prevents sticking and helps even browning.

Mix the dry ingredients: In a medium bowl, whisk 1 1/4 cups all-purpose flour, 1/2 teaspoon baking soda, 1/2 teaspoon cream of tartar, 1/4 teaspoon fine sea salt, and 1 teaspoon ground cinnamon. Set aside.

Cream the wet ingredients: In a large bowl, beat 3 tablespoons softened unsalted butter with 1/3 cup light brown sugar and 2 tablespoons granulated sugar until creamy, about 1–2 minutes. Add 1 large egg, 2 tablespoons plain 2% Greek yogurt, and 1 teaspoon vanilla extract. Mix until smooth.

Combine: Add the dry mixture to the wet ingredients and stir just until no dry streaks remain. The dough will be soft and slightly tacky. If it’s very sticky, let it rest 5 minutes; the flour will hydrate and firm up.

Make the cinnamon-sugar: In a small bowl, mix 2 tablespoons granulated sugar with 1 teaspoon ground cinnamon. This is your roll coating.

Portion the dough: Scoop the dough into 14 equal portions (about 1 tablespoon each). Roll into balls with lightly damp hands to prevent sticking.

Roll and place: Roll each ball in the cinnamon-sugar mixture. Set them on the prepared sheet, spacing about 2 inches apart. Gently press the tops to slightly flatten—this encourages even baking.

Bake: Bake for 8–10 minutes, until the edges look set and the tops have tiny cracks. They should still feel soft in the center; they’ll firm up as they cool.

Cool: Let the bites rest on the sheet for 5 minutes, then transfer to a wire rack to cool completely. This keeps them tender and chewy.

Portion for 100 calories: Each bite, as sized above, lands around 95–110 calories depending on your exact ingredients. Keep them small and consistent for accurate portions.