Soft Cinnamon Bars (Print-Friendly Version)

# What You'll Need:

→ Bar Base

01 - 1 cup (2 sticks) softened unsalted butter
02 - 2 cups white sugar
03 - 2 large eggs at room temperature
04 - 2 teaspoons pure vanilla extract
05 - 2 3/4 cups plain flour
06 - 2 teaspoons cream of tartar powder
07 - 1 teaspoon baking soda
08 - 1/2 teaspoon salt

→ Cinnamon Sugar Topping

09 - 2 tablespoons white sugar
10 - 2 teaspoons cinnamon powder

# Step-by-Step Directions:

01 - Turn your oven to 350°F (175°C). Put parchment paper in a 9x13 inch pan with extra hanging over the sides for easy lifting later, or just coat with cooking spray.
02 - Stir together 2 tablespoons sugar and 2 teaspoons cinnamon in a small dish. Put it aside for now.
03 - Mix the soft butter with 2 cups sugar in a big bowl until it's fluffy and pale, roughly 2-3 minutes.
04 - Add eggs one by one, then mix in the vanilla.
05 - In another bowl, stir together flour, cream of tartar, baking soda, and salt.
06 - Slowly add your dry mix to your butter mix, stirring just enough to combine. You'll end up with thick dough.
07 - Dump the dough in your pan and spread it flat. Since it's sticky, try using wet hands or a flat tool to make this easier.
08 - Dust the cinnamon-sugar mix all over the top of your dough.
09 - Stick in the hot oven for about 25-30 minutes. It's done when the edges turn light gold and a toothpick stuck in the middle comes out mostly clean. Don't cook too long if you want them soft.
10 - Let the whole thing cool down completely on a wire rack before cutting into squares.

# Helpful Notes:

01 - They'll stay soft and chewy for many days when kept in a sealed container on your counter.
02 - To make them tastier, try adding 1/2 teaspoon of cinnamon to the bar mixture along with the topping.
03 - The cream of tartar gives these their unique tangy taste. It's a must-have for the real flavor.