Preheat oven to 350F. Spray a 9x5x3" loaf pan with cooking spray and set aside.
Whisk together the flour, baking powder, baking soda and salt, set aside.
In the bowl of a standup mixer cream the butter and sugar together until fluffy. Add the eggs one at a time mixing well after each then add the vanilla. Add the flour with the milk and sour cream in batches, starting and finishing with the flour. Mix well. Fold in the rhubarb.
Pour into the prepared loaf pan, smooth top and bake for 60-70 min. until a tester comes out clean. Let cool 10 min. and then remove from pan and cool further on a wire rack. Store in an air tight container for a few days if needed.
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Nutrition
Serving: 1slice
Nutrition calculation is an estimation only. If you need nutritional calculations for medical reasons, please use a source that you trust.