1. Preheat oven to 350.
2. Lightly spoon flour into dry measuring cups; level with a knife. Combine
the flour, baking soda, and salt,
stirring with a whisk.
3. Place sugar and butter in a large bowl, and beat with a mixer at medium
speed until well blended (about
1 minute). Add the eggs, 1 at a time, beating well after each addition.
Add banana, yogurt, and vanilla; beat
until blended. Add flour mixture; beat at low speed just until moist.
Spoon batter into a loaf pan coated
with cooking spray. Bake at 350 for 1 hour or until a wooden pick comes
out clean.
4. Cool 10 minutes in pan on a wire rack; remove from pan. Cool
completely on wire rack.
Makes 1 loaf.