Spinach Cheese Portobello Pull-Apart Bread is a crusty sourdough loaf stuffed with a creamy spinach and mushroom filling, then finished with garlic butter and plenty of melted mozzarella. It’s rich, savory, and the kind of appetizer I like putting out when I want something warm and substantial.
The flavor here is very “garlic bread meets spinach dip,” with earthy mushrooms and just enough seasoning to keep it interesting. I like this version because the filling stays creamy instead of drying out, and the bread still keeps that chewy, crisp sourdough texture.
I usually serve it as a party appetizer, but it’s also great with soup or a simple salad for an easy dinner. If you like a little heat, a pinch of red pepper flakes at the end does a lot without changing the whole vibe of the bread.
Why You’ll Love This Recipe
Warm and cheesy: The mozzarella gets melty in all the cracks, and the top turns golden and crisp in the best way.
Real garlic bread energy: The melted butter on top makes it taste like the best parts of garlic bread, but with a creamy filling tucked inside.
Great make-ahead option: You can prep the filling ahead of time, then just stuff the loaf and bake when you’re ready.
Vegetarian, but still filling: Portobellos make it feel hearty, so it doesn’t come across like an “afterthought” appetizer.
Easy to customize: You can swap the mushrooms, add extras like artichokes, or even mix in sausage if you want it more like a meal.
Ingredients You’ll Need
Bread and cuts
- Sourdough boule: I like a crusty, sturdy loaf here because it holds the filling without going soggy. Round sourdough with a decent crust is ideal.
- Olive oil: This is for sautéing the mushrooms so they brown instead of steaming. Any decent olive oil works.
Mushroom spinach filling
- Portobello mushrooms: Chop them pretty small so they tuck into the cuts easily. Cremini works too if that’s what you have.
- Baby spinach: Fresh is best here, and I like chopping it so you don’t get long strands hanging out of the bread.
- Garlic: Fresh garlic is worth it in this recipe. It’s most of the flavor, so don’t skimp.
- Italian seasoning: This keeps the flavor familiar and “pizza-ish” without needing a bunch of separate dried herbs.
- Kosher salt: Sourdough varies a lot, so taste the filling before you stuff it and adjust if needed.
- Black pepper: Just enough to keep the filling from tasting flat. Fresh cracked is nice if you have it.
- Cream cheese: This is what makes the filling creamy and spreadable. Let it soften so it mixes in easily.
- Mayonnaise or sour cream: Either one works; mayo gives a slightly richer, smoother filling, and sour cream adds a little tang.
Cheese and topping
- Mozzarella: Pre-shredded is fine for speed, but low-moisture mozzarella melts a little cleaner. I use what’s easiest.
- Parmesan: This adds that salty, sharp edge that mozzarella doesn’t have. The green can shaker kind works in a pinch, but freshly grated is stronger.
- Unsalted butter: Melted butter is what gives you that classic garlic-bread finish on top. If you only have salted butter, just go a little lighter on the salt in the filling.
- Fresh parsley: It’s mainly for freshness and a nice finish. If you don’t have it, you can skip it, but it does help.
- Red pepper flakes: Optional, but I like a little sprinkle at the end. It cuts through the richness.
Recipe Instructions
- Preheat the oven: Heat the oven to 375°F and line a baking sheet with foil.
- Cut the bread: Cut the sourdough boule in a crosshatch pattern to make about 1-inch cubes, but don’t slice all the way through the bottom.
- Cook the mushrooms: Heat the olive oil in a skillet over medium heat, then sauté the chopped mushrooms until the moisture cooks off and they start to brown.
- Add the seasoning: Add the garlic, Italian seasoning, salt, and black pepper, and stir for about 30 seconds so the garlic doesn’t burn.
- Wilt the spinach: Stir in the chopped spinach and cook just until it wilts.
- Make it creamy: Remove from the heat, then mix in the softened cream cheese and mayonnaise (or sour cream) until creamy.
- Add the cheese: Fold in half the mozzarella and half the Parmesan.
- Stuff the loaf: Gently open the cuts in the bread and stuff the filling deep into the cracks, working it in as evenly as you can.
- Top with more cheese: Sprinkle the remaining mozzarella and Parmesan over the top and into the cuts.
- Add butter: Drizzle the melted butter over the loaf, letting it run into the cuts.
- Bake covered: Wrap the loaf loosely in foil and bake for 15 minutes.
- Bake uncovered: Uncover and bake for 8 to 12 minutes, until the cheese is melted, the edges are crisp, and the filling is hot.
- Rest and serve: Let it rest for 5 minutes, then garnish with parsley and red pepper flakes (if using) and serve warm.
Some of my tips!
This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.
Recipe Tips & Tricks
Brown the mushrooms well. Don’t rush this part. If the mushrooms still look wet, the filling can turn a little watery once it’s baked in the bread.
Soften the cream cheese first. If it’s cold, it fights you and you end up with little lumps. Room temp mixes in fast and coats everything.
Stuff it deeper than you think. The top always gets plenty of filling and cheese, so I focus on pushing the mixture down into the center cuts too.
Tent with foil if it browns fast. Some sourdough loaves brown quicker than others. If the top is getting too dark before the center is hot, just cover it again and keep baking.
Use low-moisture mozzarella if you can. It melts nicely without making the bread as wet, especially if you’re using a softer loaf.
Make some touches!
There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.
Serving Suggestions
- Soup: This is great with tomato soup or a simple chicken noodle soup. I like it most with something brothy so the bread doesn’t feel too heavy.
- Salad: A chopped salad with cucumbers, tomatoes, and a sharp vinaigrette is a good match. Keep it simple and crunchy.
- Pasta night: Put this on the table with baked ziti, spaghetti, or lasagna and let it be the “extra bread” option. It disappears fast.
- Appetizer spread: Serve it with olives, roasted red peppers, and a small veggie tray. It’s a nice mix of warm and cold snacks.
Save it for later
This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.
Storage and Make Ahead
Store leftovers covered in the fridge for up to 4 days. I usually wrap the loaf pieces in foil or keep them in a container with a tight lid so the bread doesn’t dry out too much.
To reheat, warm it in a 350°F oven until the center is hot again, or microwave individual pieces if you just want a quick snack. The oven brings the crust back better.
You can also make the filling ahead and keep it chilled for up to 24 hours. Assemble the bread right before baking so the loaf stays crusty.
If you bake it straight from the fridge, plan on a few extra minutes in the oven. I usually keep it covered a little longer so the middle heats through without over-browning the top.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
Can I use a different type of bread?
Yes. A crusty boule works best (sourdough, Italian, or a bakery-style round loaf). I’d avoid very soft sandwich bread because it collapses once you stuff it.
Can I swap the portobellos for something else?
Cremini mushrooms are the easiest swap and cook the same way. You can also use chopped cooked sausage if you want a meat option, just make sure it isn’t greasy.
Why is my filling watery?
It usually comes down to the mushrooms not being cooked long enough. Let them cook until the pan is pretty dry and they start to brown, then add the spinach just until it wilts.
How do I know it’s heated through?
The top cheese should be fully melted and the loaf should feel hot in the center when you press gently near the middle cuts. If the bread is browning too fast but the center isn’t hot yet, cover it with foil and keep baking a few more minutes.
Can I add extra mix-ins?
Yes. Sun-dried tomatoes and chopped artichokes are both really good here. Just keep the pieces fairly small so you can pack them into the cuts without tearing the bread.
You might also like
Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.
MORE DINNER RECIPES TO TRY
Spinach Cheese Portobello Pull-Apart Bread
INGREDIENTS
Bread and cuts
- 1 large sourdough boule about 16 oz
- 2 tbsp olive oil.
Mushroom spinach filling
- 2 cups portobello mushrooms finely chopped
- 2 cups baby spinach chopped
- 3 cloves garlic minced
- 1 tsp Italian seasoning
- 1 tsp kosher salt
- ½ tsp black pepper
- 4 oz cream cheese softened
- 1 tbsp mayonnaise or sour cream.
Cheese and topping
- 2 cups shredded mozzarella
- ½ cup grated Parmesan
- 4 tbsp unsalted butter melted
- 2 tbsp fresh parsley chopped for garnish
- red pepper flakes to taste.
INSTRUCTIONS
Prep and fill
- Heat oven to 375 F and line a baking sheet with foil
- cut the bread into a crosshatch pattern making 1 inch cubes without slicing through the bottom
- heat olive oil in a skillet over medium heat and saute mushrooms until moisture evaporates and they brown
- add garlic Italian seasoning salt and pepper then stir in spinach until just wilted
- remove from heat and mix in cream cheese and mayonnaise until creamy then fold in half the mozzarella and half the Parmesan
- gently open the bread cuts and stuff filling deep into the cracks then sprinkle remaining mozzarella and Parmesan over and into the cuts.
Bake and finish
- Drizzle melted butter over the top and into the cuts
- wrap loaf loosely in foil and bake 15 minutes
- uncover and bake 8 to 12 minutes until cheese is melted and edges are crisp and internal filling is hot
- rest 5 minutes then garnish with parsley and optional red pepper flakes and serve warm.
