Flaky Croissant French Toast Casserole with Brown Sugar Pecans Step-by-step instructions

Before you start

Before starting, heat the oven to 375°F (190°C) and generously butter a 9x9-inch baking dish. Tear the croissants into halves and set them aside. In a large bowl, whisk together the eggs, cream, and maple syrup until smooth.

Have the pecan topping ingredients measured and ready: chopped pecans, brown sugar, and melted butter. If using bourbon maple syrup for serving, warm it gently on the stovetop or in the microwave just before the casserole comes out of the oven.

Instructions

Prep and Soak

1. 1Prepare the dish and custard
   Heat the oven to 375°F (190°C). Butter a 9x9-inch ceramic baking dish with the softened butter. Tear the croissants into halves and arrange them in the prepared dish, cut sides facing up. In a large bowl, whisk the eggs, heavy cream, and maple syrup until fully combined and slightly frothy.
   Look for The croissants should fill the dish snugly but not be overly packed.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip Day-old croissants work best—they absorb the custard without turning mushy.
2. 2Soak the croissants
   Pour the custard evenly over the torn croissants, making sure every piece gets coated. Gently press the croissants down with a spatula to help them soak up the liquid. Let the mixture sit for 10 minutes at room temperature so the bread absorbs the custard fully.
   Look for The croissants look moist but not swimming in liquid.
   Tip If the croissants are very dry, add a couple extra tablespoons of cream.

You should have a buttered dish filled with torn croissants, and the custard poured evenly over them. The croissants will look moist and slightly puffy after the 10-minute rest. The pecan topping is mixed and crumbly, ready to sprinkle on top. At this point, the oven is preheated, and everything is ready to bake.

Bake to Golden

3. 3Make the pecan topping
   In a small bowl, stir together the chopped pecans, brown sugar, and melted butter until the pecans are evenly coated. The mixture should be crumbly and slightly clumpy.
   Look for The topping holds together when pressed but crumbles easily.
   Tip Use light brown sugar for a softer caramel flavor, or dark brown for deeper molasses notes.
4. 4Top and bake
   Sprinkle the pecan topping evenly over the soaked croissants. Place the dish in the oven and bake for 25 minutes, until the top is golden brown and puffed, and the custard is set in the center. The internal temperature of the custard should reach 160°F (71°C) to ensure the eggs are fully cooked.
   Look for The top is deeply golden, and the edges are bubbling with caramelized sugar.
   Safe temperature 160°F (71°C) internal temperature (egg dishes)
   Tip If the top browns too quickly, loosely cover with foil for the last 5 minutes.

After 25 minutes in the oven, the casserole is puffed and golden brown. The pecan topping has melted into a glossy, caramelized crust, and the edges are bubbling with sweet butter. The aroma is intensely buttery and nutty. The center should be set but not dry—a thermometer inserted into the custard reads 160°F (71°C).

Rest and Serve

5. 5Rest and serve
   Remove the casserole from the oven and let it rest for 5 minutes. This allows the custard to set further and makes slicing easier. Drizzle warm bourbon maple syrup over the top just before serving.
   Look for The casserole is puffed and golden, with a slight jiggle in the center that sets as it rests.
   Tip Serve directly from the dish for a rustic brunch presentation.

Once out of the oven, the casserole rests for 5 minutes, allowing the custard to settle. It will deflate slightly, which is normal.

The top is crisp, the interior is tender and creamy, and the pecans are shiny with caramel. Drizzle with warm bourbon maple syrup and serve immediately, while the contrast of crisp topping and soft custard is at its peak.

Common mistakes

One common mistake is over-soaking the croissants, which can make the casserole soggy. Stick to the 10-minute rest time. Another pitfall is overbaking—the custard can curdle and become rubbery if left in the oven too long.

Check the temperature early and pull the dish out as soon as it reaches 160°F (71°C). Finally, don't skip the rest time after baking; it helps the casserole hold its shape when served.

How to tell it’s done

The casserole is done when the top is deeply golden and puffed, and the custard is set—it should not jiggle in the center when gently shaken. To be certain, insert an instant-read thermometer into the thickest part of the custard; it should read at least 160°F (71°C), ensuring the eggs are fully cooked.

The edges will be bubbling with caramelized sugar, and the pecans will look toasted and glossy. Let it rest for 5 minutes before serving to allow the custard to firm up.

• Egg dishes: 160°F (71°C) in the thickest part