Soft & Thick Snickerdoodles

INGREDIENTS

3 cups

all-purpose flour (spoon & leveled)

2 tsp

cream of tartar*

1 tsp

baking soda

and 1/2 teaspoons ground cinnamon

1/2 tsp

salt

1 cup

or 230g) unsalted butter, softened to room temperature

and 1/3 cup (267g) granulated sugar

large egg, at room temperature

2 tsp

pure vanilla extract

1/3 cup

granulated sugar

1 tsp

ground cinnamon