Quick bread like zucchini bread and banana bread often come out of the oven with a big crack down the center of the top of the bread. Don’t panic! This is a good thing! Quick breads crack as steam from the bread escapes from the center. The other reason is because the edges of the bread set faster than the center, so as the unbaked center rises, the edges pull on the top of the loaf, resulting in a crack. A crack is a sign of a well baked loaf, because it means that the bread has risen properly. The center will be fluffy and tender instead of dense. Embrace it!