2 c. all-purpose flour
1 tbsp. baking powder
1 tsp. salt
1 1/2 tsp. ground cinnamon
1 c. sugar
2 lg. eggs, beaten
1 c. buttermilk
1/3 c. vegetable oil
2 tsp. vanilla extract
2 tbsp. sugar
1 tsp. ground cinnamon
2 tsp. butter, softened

Combine first 5 ingredients in a mixing bowl. Combine eggs and next 3 ingredients; add to dry ingredients. Beat at medium speed with electric mixer 3 minutes.

Grease bottom of a 9 x 5 x 3 inch loaf pan. Combine 2 tablespoons sugar, cinnamon and butter in a small bowl until crumbly. Spoon evenly over batter and top with remaining batter. Gently swirl batter with a knife to create a marble effect. Bake at 350 degrees for 50 minutes or until a wooden toothpick inserted in center comes out clean. Remove from pan and completely cool on wire rack.