This Cinnamon Toast Crunch Bread is a soft, moist quick bread packed with crushed Cinnamon Toast Crunch cereal folded right into the batter, a ribbon of cinnamon sugar swirled through the center, and a buttery, crunchy crumble topping that bakes up golden and crisp. No yeast, no stand mixer — just one bowl, a loaf pan, and just over an hour until you have a bakery-worthy loaf that smells absolutely incredible and tastes even better.
Preheat oven to 350°F (175°C). Grease a 9x5-inch loaf pan and line with a parchment paper sling, leaving overhang on the long sides for easy removal.
Place 1 cup of cereal in a zip-lock bag and crush into fine crumbs for the batter; crush the remaining ½ cup more coarsely in a separate bag for the topping. Set aside.
Combine flour, sugar, and cinnamon in a small bowl, then cut in cold butter with a pastry cutter until coarse crumbles form. Stir in the coarsely crushed cereal and refrigerate until needed.
Stir together the sugar and cinnamon for the swirl filling, then mix in the melted butter to form a thick paste. Set aside at room temperature.
Whisk flour, baking powder, baking soda, salt, and cinnamon together in a large bowl for 30 seconds, then stir in the finely crushed cereal.
In a separate bowl, whisk sugar, eggs, sour cream, oil, vanilla, and milk together vigorously for about 1 minute until smooth and fully combined.
Pour the wet ingredients into the dry ingredients and fold gently with a rubber spatula just until no streaks of flour remain — do not overmix.
Spread half the batter into the prepared pan, dollop the cinnamon swirl filling over the top, then cover with the remaining batter and optionally swirl with a knife for a marbled effect.
Sprinkle the chilled crumble topping evenly over the batter and press lightly to adhere, then bake for 50–60 minutes until deep golden and a toothpick inserted in the center comes out with just a few moist crumbs. Tent with foil if the top browns too quickly.
Cool in the pan on a wire rack for 15 minutes, then lift out using the parchment sling and cool for at least 30 minutes total before slicing with a serrated knife.
Notes
Don't overmix: Fold wet and dry ingredients together just until the flour disappears — overmixing leads to a dense, rubbery loaf.
Room temperature dairy: Use room-temperature eggs and sour cream for a smoother batter and more even crumb.
Keep the crumble cold: Cold butter is the secret to a crunchy, chunky topping. If your kitchen is warm, freeze the crumble for 10 minutes before topping the loaf.
Crush cereal in two textures: Fine crumbs go in the batter for flavor; coarser pieces go in the topping for crunch and visual appeal.
Tent with foil if needed: If the top browns too fast around the 35–40 minute mark, loosely cover with foil and remove it for the last 5–10 minutes to re-crisp.
Test doneness correctly: A toothpick should come out with just 1–2 moist crumbs, not wet batter. An instant-read thermometer should read 200°F (93°C).
Make ahead: This bread gets more flavorful overnight as the cinnamon infuses the crumb. Bake the evening before and store tightly wrapped at room temperature.
Storage: Store wrapped at room temperature for up to 3 days, in the fridge for up to 5 days, or freeze individual slices for up to 3 months.
Dairy-free option: Substitute full-fat coconut cream or dairy-free yogurt for the sour cream, oat or almond milk for the whole milk, and plant-based butter for the unsalted butter.
Variations: Fold in ½ cup mini chocolate chips, ½ cup diced apple, or ½ cup mashed banana for fun flavor twists. A powdered sugar glaze also makes a beautiful bakery-style finish.