01 -
Preheat oven to 350°F. Grease or line a 9×5-inch loaf pan.
02 -
In a medium bowl, whisk together flour, baking powder, baking soda, and salt until thoroughly combined.
03 -
In a large bowl, whisk melted butter and granulated sugar until smooth. Add eggs one at a time, mixing well after each addition. Stir in vanilla extract and buttermilk until fully incorporated.
04 -
Gradually fold dry ingredients into the wet mixture, mixing until just combined. Avoid overmixing to maintain a tender crumb.
05 -
Gently fold in red and green jimmies sprinkles, mixing minimally to prevent the colors from bleeding.
06 -
Transfer batter to the prepared loaf pan, smoothing the top with a spatula. Sprinkle coarse sugar and additional sprinkles over the surface as desired.
07 -
Bake for 45–55 minutes, or until a toothpick inserted into the center emerges clean.
08 -
Allow to cool in the pan for 10–15 minutes, then transfer to a wire rack and cool completely before slicing.