Preheat oven: Preheat oven to 375°F (190°C). Line baking sheets with parchment paper.
Cream butter and sugars: In a large mixing bowl, use an electric mixer to cream together butter, granulated sugar, and brown sugar until light and fluffy (about 2-3 minutes).
Add eggs and vanilla: Beat in eggs one at a time, then stir in vanilla extract.
Combine dry ingredients: In a separate bowl, whisk together flour, baking powder, and salt.
Mix dough: Gradually blend dry ingredients into the wet mixture until just combined. Do not overmix.
Prepare coating: In a shallow plate, mix together cinnamon and sugar for coating.
Portion dough: Using a cookie scoop, portion dough into 1-inch balls.
Coat cookies: Roll each dough ball in the cinnamon-sugar mixture to coat evenly.
Bake: Place cookies 2 inches apart on prepared baking sheets. Bake for 10-12 minutes or until edges are golden brown.
Cool: Cool on baking sheets for 5 minutes before transferring to wire racks to cool completely.