1 cup butter, softened
1 cup brown sugar
1 cup all-purpose flour
1/2 teaspoon salt
1/2 cup vegetable oil
1 egg
1 1/2 cups finely chopped celery
1 1/2 teaspoons baking powder
2 cups packed light brown sugar
Preheat oven to 400 degrees F (200 degrees C). Grease muffin cups or line with paper muffin liners.
In a large bowl, cream together the butter, sugar and flour. Stir in the salt, oil and eggs. Mix until well blended.
In a medium bowl, combine brown sugar, brown sugar mixture, celery and baking powder. Stir flour mixture into butter mixture until just blended. Spoon batter into prepared paper liners.
Bake in preheated oven for 50 minutes, until a knife inserted in center of each muffin comes out clean.