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Creamy Mushroom Onion Boil
🛒 Quick Ingredients
📋 Complete Ingredients List
💡 Pro tip: Tap items to check them off as you prep!
- 2 lbs mixed mushrooms (button, cremini, shiitake), sliced
- 3 large yellow onions, thinly sliced
- 4 cups vegetable broth
- 1 cup heavy cream
- 4 cloves garlic, minced
- 2 tablespoons butter
- 2 tablespoons fresh thyme leaves
- 1 tablespoon Worcestershire sauce
- 2 teaspoons cornstarch (optional, for thickening)
- 1 teaspoon black pepper
- 1 teaspoon sea salt
🍳 Quick Cooking Steps
Place sliced onions in the bottom of the slow-cooker
Layer sliced mushrooms on top of the onions
Add minced garlic, thyme, salt, and pepper
Pour in vegetable broth and Worcestershire sauce
Cover and cook on LOW for 6-8 hours or HIGH for 3-4 hours
In the last 30 minutes, stir in the heavy cream
If desired, whisk cornstarch with 2 tablespoons cold water and stir into the mixture to thicken
Add butter and let it melt into the mixture
Taste and adjust seasonings as needed
Let rest for 10 minutes before serving to allow sauce to thicken
🔧 Kitchen Tools & Equipment
📋 Complete Tools List
- 6-quart slow-cooker
- Sharp chef's knife
- Cutting board
- Measuring cups and spoons
- Large mixing bowl
- Wooden spoon
- Ladle
- Small whisk
⚡ Quick Cooking Tips
Use a mix of wild mushrooms for more complex flavor
Add white wine for extra depth of flavor
Try adding caramelized onions on top before serving
Include dried porcini mushrooms for intense umami taste
Add fresh herbs like rosemary or sage for variety
Make it richer with a splash of cognac near the end
Top with crispy fried onions for texture contrast
📊 Nutrition Facts
🔥 Time to Burn Calories
Walking 50min, Running 25min, Cycling 35min
📦 Storage & Meal Prep
🥶 Storage Instructions
- Allow to cool completely before storing
- Store in airtight containers in the refrigerator for up to 4 days
- Keep sauce separate from any accompaniments
🔥 Reheating Tips
- Reheat in slow-cooker on LOW for 1-2 hours
- Microwave in 1-minute intervals, stirring between
- Add a splash of broth if mixture seems too thick when reheating
⏰ Make Ahead Tips
- Slice mushrooms and onions up to 24 hours in advance
- Measure and combine dry seasonings ahead of time
- Prep garlic and herbs the day before
❄️ Freezing Guide
- Freeze without cream for up to 2 months
- Thaw overnight in refrigerator
- Add fresh cream when reheating for best results
🍽️ Serving Suggestions
- Serve over buttered egg noodles or rice
- Pair with crusty sourdough bread for dipping
- Top with fresh parsley and extra black pepper
- Serve alongside roasted green vegetables
- Garnish with additional fresh thyme leaves
⚠️ Common Mistakes
- Adding cream too early in the cooking process
- Using too much liquid which dilutes flavors
- Not slicing onions thinly enough for proper cooking
- Opening the slow-cooker lid too frequently
- Forgetting to season adequately throughout layers
🎨 Recipe Variations
- French-style: Add white wine and herbs de Provence
- Asian-inspired: Include soy sauce and sesame oil
- Italian version: Add Parmesan and Italian herbs
- Swedish style: Include dill and a touch of mustard
- Hungarian variation: Add paprika and sour cream
❓ Quick Cooking Q&A
Yes, rehydrate them first in hot water and use the soaking liquid as part of your broth.
Yes, but freeze before adding cream and add fresh cream when reheating.
Yes, substitute cream with coconut cream or cashew cream.
Add it during the last 30 minutes of cooking and keep temperature on LOW.
Fresh mushrooms are preferred, but frozen can work - expect more liquid release.
Use cornstarch slurry in the last 30 minutes of cooking.
A mixture of varieties provides the best flavor and texture.
Yes, reduce cooking time to 3-4 hours on HIGH.
They might be overcooked - try reducing cooking time slightly.
Yes, hardy vegetables like carrots work well added at the beginning.
