Aunt Norma's Rhubarb Muffins

By charliebabe

4.73 / 5

15min

25min

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2 ½ cups flour
1 teaspoon baking soda
1 teaspoon baking powder
½ teaspoon salt
1 ¼ cups brown sugar
½ cup vegetable oil
1 egg
1 teaspoon vanilla extract
1 cup buttermilk
1 ½ cups diced rhubarb
½ cup chopped walnuts
1 tablespoon melted butter
⅓ cup white sugar
1 teaspoon ground cinnamon