Preheat your oven to 350°F (175°C) and prepare a 9x5 loaf pan by greasing it or lining it with parchment paper.

In a medium bowl, whisk together 2 cups of all-purpose flour, 2 teaspoons of baking powder, 1 teaspoon of baking soda, and ½ teaspoon of salt until well combined.

In a large mixing bowl, cream together ½ cup of melted unsalted butter and 1 cup of granulated sugar until smooth and slightly fluffy. Add 2 large eggs one at a time, mixing well between each addition, then add 1 teaspoon of vanilla extract and 1 cup of buttermilk.

Gradually add the dry ingredient mixture into the wet ingredients, stirring gently until just combined without overmixing.

Carefully fold in ½ cup of red and green sprinkles into the batter.

Pour the batter into your prepared loaf pan, smoothing the top with a spatula.

Bake for 45-55 minutes, checking for doneness around the 40-minute mark with a toothpick inserted in the center.

Let the bread cool in the pan for 10-15 minutes, then transfer to a wire rack to cool completely before slicing.