1. Preheat the Oven:

Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper.

2. Prepare the Brownie Batter:

• In a medium saucepan, melt the butter over medium heat. Remove from heat and stir in the granulated sugar until well combined.
• In a large mixing bowl, whisk together the eggs and vanilla extract. Gradually add the butter and sugar mixture, whisking constantly until smooth.
• Stir in the Dr. Pepper soda until fully incorporated.

3. Mix the Dry Ingredients:

• In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt.
• Gradually fold the dry ingredients into the wet mixture, stirring until just combined.

4. Bake the Brownies:

• Pour the batter into the prepared baking pan and spread it evenly.
• Bake for 30-35 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
• Allow the brownies to cool completely before adding the glaze.

5. Prepare the Dr. Pepper Glaze:

• In a small saucepan, combine the Dr. Pepper soda, butter, and cocoa powder. Heat over medium heat until the butter melts and the mixture is smooth.
• Remove from heat and whisk in the powdered sugar and vanilla extract until smooth.

6. Glaze and Serve:

• Pour the warm glaze over the cooled brownies, spreading it evenly.
• Let the glaze set for about 15 minutes before slicing into squares.
• Serve and enjoy!