Cheesy Bacon Brussels Sprouts Au Gratin in the Slow Cooker

This cheesy bacon Brussels sprouts au gratin is the side dish that turns sprout skeptics into superfans. With just a few minutes of prep, the slow cooker does all the work, transforming humble Brussels sprouts into a creamy, smoky, utterly irresistible casserole.

Crispy bacon, nutty Gruyère, and a rich garlic-cream sauce come together in one pot for a hands-off side that steals the show at any dinner. Whether you’re serving it for a holiday feast or a weeknight comfort meal, this recipe delivers deep flavor with minimal effort.

Brussels sprouts have come a long way from the boiled, bitter orbs many grew up dreading. This slow-cooker version takes them to a whole new level, simmering them low and slow in a velvety cream sauce with smoky bacon and nutty Gruyère.

The result is tender, creamy, and packed with savory depth—the kind of dish that makes people ask for the recipe.

Because everything goes into one pot and cooks unattended, it’s perfect for busy weeknights or holiday entertaining. Serve it alongside roasted meats, or make it the star of a vegetarian spread (minus the bacon). Either way, it’s comfort food at its finest.

Ingredients

Why this recipe works

Slow cooking Brussels sprouts in cream is the secret to their transformation. The low, gentle heat breaks down their fibrous texture without turning them mushy, leaving them tender with a slight bite. As they cook, they absorb the garlic and bacon flavors, while the cream reduces and thickens into a luscious sauce that clings to every leaf.

The combination of Gruyère and bacon is a classic flavor pairing that elevates the humble sprout. Gruyère brings a nutty, slightly sweet richness that melts beautifully, while crispy bacon adds smoky, salty crunch.

Together, they create a gratin that’s indulgent, satisfying, and impossible to resist—even for those who swear they don’t like Brussels sprouts.

Notes and substitutions

Choose Brussels sprouts that are firm, bright green, and similar in size for even cooking. Trim the stem ends and remove any yellow or wilted outer leaves. Halving them ensures they cook through and soak up the sauce. For the bacon, use thick-cut for extra chew, or cook it until very crisp so it holds up during the slow simmer.

Gruyère is the classic choice here, but Swiss cheese or sharp white cheddar work well too. Heavy cream gives the sauce its signature richness; for a lighter version, use half-and-half mixed with a little flour to thicken. If you prefer a crunchy topping, add toasted breadcrumbs or extra bacon just before serving.

• Gruyère: Swiss cheese or sharp white cheddar can be used in place of Gruyère for a similar nutty, melty result.
• Heavy cream: For a lighter sauce, substitute half-and-half mixed with 1 tablespoon all-purpose flour to help thicken.
• Bacon: Use turkey bacon or omit for a vegetarian version; add a pinch of smoked paprika to mimic the smoky flavor.

Equipment

• 6-quart slow cooker (Crockpot)
• Cutting board
• Chef's knife
• Measuring cups
• Wooden spoon
• Small skillet (for bacon, if not using pre-cooked)
• Paper towels