Preheat oven to 350°F (175°C). Grease and flour a 9x5 inch loaf pan.
In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
In a separate bowl, cream together butter and sugar until light and fluffy. Beat in eggs one at a time, then stir in vanilla.
Gradually add the dry ingredients to the wet ingredients, alternating with the buttermilk, beginning and ending with the dry ingredients. Mix until just combined.
Stir in sprinkles.
Pour batter into prepared loaf pan and bake for 50-60 minutes, or until a wooden skewer inserted into the center comes out clean.
Let cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
Notes
Store leftover bread in an airtight container at room temperature for up to 3 days.