# Components:
→ Cake
01 - 2 cups all-purpose flour
02 - 1 ½ teaspoons baking powder
03 - ½ teaspoon baking soda
04 - 1 teaspoon ground cinnamon
05 - ½ teaspoon salt
06 - 1 cup unsalted butter, softened
07 - 1 ¼ cups granulated sugar
08 - ½ cup packed light brown sugar
09 - 3 large eggs
10 - 1 tablespoon vanilla extract
11 - 1 ¼ cups root beer (not diet)
12 - ½ cup sour cream
→ Cinnamon Frosting
13 - ½ cup unsalted butter, softened
14 - 4 ounces cream cheese, softened
15 - 2 cups powdered sugar
16 - 1 teaspoon ground cinnamon
17 - 2 tablespoons root beer
18 - ½ teaspoon vanilla extract
19 - Pinch of salt
→ Topping
20 - 1 cup salted pretzels, roughly crushed
# Directions:
01 - Preheat the oven to 350°F (175°C). Grease a 9x13-inch sheet cake pan thoroughly and line with parchment paper for effortless removal.
02 - Whisk together all-purpose flour, baking powder, baking soda, ground cinnamon, and salt in a medium mixing bowl until evenly distributed.
03 - In a large bowl, beat softened butter, granulated sugar, and light brown sugar using a stand mixer or hand mixer on medium speed until the mixture becomes light and fluffy, approximately 3 minutes.
04 - Add eggs one at a time, beating well after each addition. Incorporate the vanilla extract, ensuring the mixture is homogeneous.
05 - Mix in the flour mixture in three additions, alternating with root beer and sour cream, beginning and ending with flour. Blend until just combined to avoid overmixing.
06 - Transfer the batter to the prepared pan and smooth the surface evenly with a spatula. Bake for 32–36 minutes, or until a toothpick inserted in the center exits clean. Cool the cake in the pan on a wire rack completely.
07 - Beat softened butter and cream cheese together until completely smooth. Gradually add powdered sugar, then ground cinnamon, root beer, vanilla extract, and a pinch of salt. Continue beating until light and fluffy.
08 - Spread cinnamon frosting evenly over the cooled cake, using a spatula for a smooth finish.
09 - Sprinkle crushed salted pretzels over the frosted cake immediately prior to serving for optimal crunchiness.
