Preheat oven to 375 degrees F. Line cookie sheets with parchment paper.
In a small bowl, combine the 3 tablespoons sugar and 1/2 tablespoon cinnamon. Set aside.
In a large bowl with an electric mixer, blend together the sugar, butter, and shortening, until fluffy. Add in the eggs and continue to blend until incorporated and smooth.
Add in the dry ingredients and blend until the batter is fully incorporated.
Using a small cookie scoop, form dough into rounded tablespoon sized balls, then gently roll in the cinnamon-sugar mixture.
Place 2 inches apart on the cookie sheets.
Bake 8-10 minutes. Immediately remove from sheets and cool completely on a wire rack.