| 2 eggs large | whisk together until smooth | stir in sour cream | fold dry into wet, mix until just incorporated, transfer to pan, bake 55–65 min until set | cool 20 min in pan, remove to wire rack, peel parchment, cool completely |
| 1 3/4 cup bananas or 4 ripe bananas medium, mashed |
| 1/2 cup salted butter or 115 gram, or 1 stick melted and slightly cooled |
| 3/4 cup light brown sugar or 165 gram packed |
| 1 teaspoon vanilla extract |
| 1/4 cup sour cream or 57 gram |
| 2 cup all-purpose flour or 256 gram | whisk together the dry ingredients |
| 1 teaspoon baking soda |
| 1/2 teaspoon kosher salt such as Diamond Kosher |
| 1/2 teaspoon ground cinnamon |
| throughout: Nonstick spray for greasing |