Why did my quick bread sink in the middle?

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Tags

1. #baking
2. #leavening
3. #means
4. #before
5. #soapy
6. #middle
7. #aftertaste
8. #bread
9. #stood
10. #bitter
11. #batter
12. #soggy
13. #texture
14. #powder
15. #result
16. #liquid
17. #there
18. #underdone
19. #ingredients
20. #insufficient
21. #proportion