How to Make It
Preheat oven to 350°F.
Combine first 4 ingredients. Combine brown sugar and butter in the bowl of a stand mixer; beat at medium speed 1 minute. Add eggs; beat just until combined. Add banana, yogurt, and vanilla; beat to combine. Reduce speed to medium-low; add flour mixture, beating just until combined.
Divide batter among 6 (5- x 3-inch) mini loaf pans or 12 muffin cups coated with cooking spray. Bake at 350°F for 25 to 30 minutes or until a toothpick inserted in center comes out with a few moist crumbs clinging. Cool in pans on wire racks 10 minutes. Remove bread to wire rack; cool completely.
Combine powdered sugar, bourbon, and cream; drizzle over bread. Top with cinnamon.