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Blackberry Syrup Baked French Toast Casserole Recipe

This baked French toast casserole with blackberry maple syrup is an easy make-ahead breakfast that’s perfect for holidays, brunch, or any relaxed morning. Cubes of crusty bread are soaked in a lightly sweetened, creamy custard with juicy blackberries, then baked and finished with a glossy blackberry maple syrup.

The tart brightness of blackberries pairs perfectly with the rich, custardy bread. This dish quickly became a family favorite—great warm or served cold as a snack or dessert. Below you’ll find tips for the best results and a straightforward recipe that’s easy to make year-round using frozen berries.

For the casserole you’ll need: a loaf of crusty bread (such as sourdough), eggs, milk, whole-milk Greek yogurt, maple syrup (or honey), vanilla, salt, and frozen blackberries. For the blackberry maple syrup: frozen blackberries, maple syrup, vanilla, cornstarch, and a pinch of salt.

Slice of French Toast Casserole with Blackberries covered with blackberry syrup and a baking dish and jar of blackberry syrup in the back

The recipe works well with frozen Oregon blackberries, which retain great flavor and make this bake possible any time of year. If you prefer fresh fruit in season, that works wonderfully too. The blackberry syrup elevates the dish—pour it over slices of casserole, pancakes, or ice cream for an extra burst of berry flavor.

Why This Casserole Works

This version is more custard-forward than many standard baked French toasts thanks to whole-milk Greek yogurt folded into the custard. The result is a thicker, creamier bake that feels decadent while relying on real food ingredients and no refined sugar. Blackberries add vitamin C, vitamin K, and fiber, so it’s a breakfast that tastes indulgent and still feels wholesome.

Tips for Best Results

  • Use crusty bread like sourdough or French bread. Day-old bread is ideal; very soft bread can become soggy if soaked too long.
  • Allow the bread to soak in the custard for about 30 minutes (or up to an hour in the fridge) so it absorbs the liquid and develops a custardy interior.
  • If your loaf is small or very dense, you may not need all the custard—watch how the bread absorbs the mixture and adjust.
  • Layer bread and berries so the blackberries are distributed throughout the casserole: half the bread, scatter berries, add remaining bread, top with more berries.
  • This casserole works with blackberries, raspberries, or marionberries—use what you have or prefer.

Leftovers reheat well. Warm a slice in a toaster oven, microwave, or skillet with a little butter. It’s delicious reheated and also makes a great cold snack.

Bread and blackberries in baking dish with custard filling in a bowl with a whisk

Baked French Toast Casserole with Blackberry Maple Syrup

Slice of French Toast Casserole with Blackberries covered with blackberry syrup and a baking dish and jar of blackberry syrup in the back

Baked French Toast Casserole With Blackberry Syrup

Crusty bread is baked in a lightly sweetened, creamy custard with blackberries and finished with blackberry syrup.

Prep Time: 10 minutes   Total Time: 55 minutes   Servings: 8

Ingredients

  • 1 loaf crusty bread (about 16 oz)
  • 6 eggs
  • 1.5 cups milk
  • 1 cup whole-milk Greek yogurt
  • 1/2 cup maple syrup or honey
  • 1 tsp vanilla extract
  • 2 cups frozen blackberries (for the casserole)

Blackberry Syrup

  • 3/4 cup maple syrup
  • 2 cups frozen blackberries
  • 1/2 tbsp vanilla extract
  • 1 tbsp cornstarch
  • Dash of salt

Instructions

French Toast Casserole

  1. Preheat oven to 350°F.
  2. In a large bowl, whisk together eggs, yogurt, milk, vanilla, and maple syrup until smooth. Set aside.
  3. Cut the bread into strips or cubes. Layer half the bread in a 9×13-inch pan.
  4. Scatter 1 cup frozen blackberries over the first layer, then add the remaining bread and top with the rest of the berries.
  5. Pour the custard over the bread, pressing down gently so the top pieces soak. Refrigerate at least 30 minutes to an hour.
  6. Bake at 350°F for 45–60 minutes, until the top is set and golden. If any pieces have floated, lightly press them down before baking.

Blackberry Syrup

  1. In a saucepan over medium heat, combine blackberries and maple syrup. Bring to a simmer and cook 5–10 minutes until the berries break down.
  2. In a small cup, whisk cornstarch with the vanilla (and a little water if needed) to form a slurry. Stir the slurry into the berry mixture and bring to a boil for about a minute until thickened. Remove from heat and cool. Refrigerate up to 4–7 days.

Notes

Loaf sizes vary; if your loaf is small or dense, you may not need all the custard. Use visual judgment when pouring to avoid an overly soggy bake.

Nutrition (per serving)

Calories: 408 kcal | Carbohydrates: 73 g | Protein: 15 g | Fat: 5 g | Fiber: 5 g

Slice of French Toast Casserole with Blackberries and a baking dish in the back

Have you tried Oregon blackberries? How do you like to use them? This casserole is a great way to highlight their flavor all year long.

If you enjoy this recipe, consider trying similar breakfast bakes such as Apple Dutch Baby pancakes, blackberry breakfast bread, or pumpkin banana breakfast muffins.

Photo credit and recipe adapted from the original creator. Thank you to the Oregon blackberry growers for the inspiration.