Preheat your oven to 180°C (350°F) and line a baking sheet with parchment paper.
In a large bowl, cream together the softened butter and 1 cup of sugar until the mixture is light and fluffy—this will take about 2-3 minutes and you’ll notice it becomes pale and slightly increased in volume.
Add the egg and vanilla extract to the creamed mixture, then beat until fully combined and smooth—this creates a glossy, cohesive batter with a pleasant aroma of vanilla.
In a separate bowl, whisk together the flour, baking soda, cream of tartar, and salt. This ensures even distribution of leavening agents and salt.
Gradually add the dry ingredients into the wet mixture, folding gently with a spatula or spoon just until the dough comes together—avoid overmixing to keep the cookies tender.
In a small bowl, mix 3 tablespoons of cinnamon with 1/2 cup of sugar. Use your fingers to crack the sugar slightly, making it coarser for a crunchier coating.
Scoop out about 1.5-inch diameter portions of dough using a cookie scoop or tablespoon, then roll each into a smooth ball.
Roll each dough ball in the cinnamon-sugar mixture, pressing slightly if needed to ensure an even coating, and place them on the prepared baking sheet with space between each.
Bake the cookies for 10-12 minutes, or until they crackle and turn golden around the edges. You’ll smell the warm aroma of cinnamon and sugar filling your kitchen.
Let the cookies rest on the baking sheet for about 5 minutes to firm up, then transfer them to a wire rack to cool completely—this helps set their charming crackled surface.
Once cooled, enjoy your homemade snickerdoodles warm or at room temperature, perhaps with a glass of milk or tea, and savor their tender, crackly texture with a burst of cinnamon-sugar flavor in every bite.
