Mushroom Gruyère Bread Pudding Stuffing (Slow Cooker)

Imagine a side dish that tastes like a French bistro dream, but comes together in your slow cooker with minimal effort. This mushroom Gruyère bread pudding stuffing is exactly that.

Cubes of challah soak up a rich custard, while browned cremini mushrooms and nutty Gruyère melt into every bite. The slow cooker does all the work, transforming simple ingredients into a puffed, golden, savory pudding that will steal the show at any holiday table or cozy weeknight dinner.

This slow cooker bread pudding is the ultimate hands-off side dish. You start by browning mushrooms and garlic, then layer everything in your Crockpot with challah and Gruyère.

A simple custard of cream and eggs is poured over the top, and after a few hours on low, you have a decadent, savory pudding that's crisp on top and tender underneath. It's perfect for Thanksgiving, Easter, or any gathering where you want a rich, comforting side without taking up oven space.

Ingredients

Why this recipe works

The slow cooker method here is genius: it gently steams and bakes the custard into the bread, creating a texture that's soft and creamy in the center with a golden, slightly crisp top.

Because the heat is low and even, the eggs set without curdling, and the cheese melts into a stretchy, gooey layer. This method also frees up your oven for other dishes, making it a practical choice for holiday cooking.

Browning the mushrooms first is a key step. It concentrates their flavor and removes excess moisture, so they don't make the bread pudding soggy. The garlic and thyme bloom in the butter, adding aromatic depth.

Layering the challah, mushrooms, and cheese ensures every spoonful has a balance of textures and flavors. The custard, made with heavy cream and eggs, binds everything together into a rich, savory bread pudding.

Notes and substitutions

Challah is the ideal bread for this recipe because it's rich, slightly sweet, and sturdy enough to hold up to the custard without turning mushy. If challah isn't available, brioche or a good sourdough will work beautifully. Use day-old bread if possible; slightly stale bread absorbs the custard better. If using fresh bread, you can toast the cubes briefly in the oven to dry them out.

Cremini mushrooms are the classic choice, but you can use white button mushrooms or a mix of wild mushrooms for more depth. Gruyère is essential for its nutty, melty quality, but Swiss or white cheddar can substitute. The heavy cream gives the custard its luxurious richness; for a lighter version, half-and-half works, though the result will be less decadent. Always use fresh thyme for the best flavor.

• challah bread: brioche or sourdough bread (cubed)
• cremini mushrooms: white button mushrooms or a mix of wild mushrooms
• Gruyère cheese: Swiss cheese or white cheddar
• heavy cream: half-and-half (for a lighter custard)

Equipment

• 6-quart slow cooker
• Large skillet
• Mixing bowl
• Whisk
• Cutting board
• Chef's knife