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Smoky BBQ Onion Boil

4.8/5

5 reviews

380min Total Time

6 people Servings

Easy Difficulty

Budget Cost

320 kcal Calories

Ingredients

6 large sweet onions, peeled and quartered
2 lbs baby potatoes, whole
6 ears corn on the cob, cut into thirds
1 cup BBQ sauce
2 tablespoons liquid smoke
2 tablespoons smoked paprika
1/4 cup brown sugar
2 tablespoons garlic powder
2 tablespoons onion powder
2 tablespoons black pepper
1 tablespoon cayenne pepper (optional)
4 cups vegetable broth
2 tablespoons butter or oil
2 tablespoons sea salt

Instructions

In a large mixing bowl, combine BBQ sauce, liquid smoke, smoked paprika, brown sugar, garlic powder, onion powder, black pepper, and cayenne pepper

Place quartered onions, potatoes, and corn pieces in the slow-cooker

Pour the seasoning mixture over the vegetables

Add vegetable broth and butter/oil to the slow-cooker

Sprinkle sea salt over the ingredients

Cover and cook on LOW for 6-8 hours or HIGH for 3-4 hours until vegetables are tender

Gently stir once halfway through cooking time

Check vegetables for tenderness with a fork

Serve hot, garnished with additional BBQ sauce if desired

Troubleshooting

If vegetables are too firm, continue cooking in 30-minute increments

If liquid is too thin, remove lid for last 30 minutes of cooking

If too spicy, add a tablespoon of butter to mellow heat

If vegetables are cooking unevenly, ensure they're cut to similar sizes

If flavors are bland, add more BBQ sauce and seasonings

Recipe Variations

Cajun Style: Add crawfish, shrimp, and Cajun seasoning

Garden Vegetable: Include bell peppers, celery, and carrots

Smoky Maple: Use maple BBQ sauce and add bacon

Spicy Southwest: Add jalapeos and Mexican-style corn

Asian Fusion: Use hoisin sauce instead of BBQ sauce and add ginger

Serving Suggestions

Serve with crusty bread for soaking up the flavorful broth

Add grilled shrimp or sausage for a protein boost

Pair with a cold beer or lemonade

Serve with additional BBQ sauce on the side

Garnish with fresh parsley or green onions

Nutrition Facts

320

Calories

Protein

65g

Carbs

Fat

Common Mistakes to Avoid

Adding too much liquid which dilutes flavors

Cutting vegetables too small, causing them to become mushy

Not checking vegetables halfway through cooking

Forgetting to season the broth adequately

Overcrowding the slow-cooker

Frequently Asked Questions

How do I know when the vegetables are done?

They should be tender when pierced with a fork but not falling apart.

Can I add meat to this recipe?

Yes, add pre-cooked sausage or shrimp during the last 30 minutes of cooking.

Why use a slow-cooker instead of stovetop?

Slow-cooking develops deeper flavors and requires less attention.

Can I make this recipe less spicy?

Yes, omit the cayenne pepper and use a mild BBQ sauce.

What type of onions work best?

Sweet onions are recommended, but yellow onions also work well.

How much liquid should I use?

The liquid should just barely cover the vegetables.

Can I double this recipe?

Yes, if your slow-cooker is large enough, but increase cooking time by 1-2 hours.

What if I don't have liquid smoke?

You can omit it or substitute with smoked paprika.

Can I use frozen corn?

Yes, but add it during the last hour of cooking.

How do I prevent the vegetables from getting mushy?

Don't cut them too small and don't overcook.

What size slow-cooker should I use?

A 6-quart slow-cooker is ideal for this recipe.

Can I make this ahead for a party?

Yes, keep warm in slow-cooker on LOW setting for up to 2 hours.

How spicy is this recipe?

Moderately spicy, but heat level can be adjusted.

What BBQ sauce works best?

A smoky or traditional BBQ sauce is recommended.

Can I add seafood to this boil?

Yes, add during last 30 minutes to avoid overcooking.

Reviews

Xavier P.

Mar 31, 2026

Perfect for our summer gathering! The smoky flavor was incredible.

Yolanda M.

Mar 16, 2026

Great recipe, though I added more spice for extra kick.

Zara K.

Mar 24, 2026

So easy and delicious! My new go-to for entertaining.

Winston R.

Mar 25, 2026

Love how the vegetables absorbed all the smoky flavors.

Victoria T.