I'm Caitlin - culinary hostess, wellness retreat curator, and homebody at heart. This blog is where I share seasonal recipes, intentional living tips, and behind-the-scenes moments from my kitchen, travels, and retreats.
Here to make healthy living feel thoughtful and approachable - one recipe, ritual, or gathering at a time.
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Earthy mushrooms, sweet caramelized onions, and melty fontina come together on a perfectly golden flatbread crust for a dish that feels both rustic and sophisticated. Finished with a drizzle of truffle oil and a sprinkle of flakey sea salt, this wild mushroom flatbread is just as perfect for a dinner party appetizer as it is for a cozy movie night on the couch.
Caramelize the Onions : Heat butter and olive oil in a skillet over medium heat. Cook onions slowly (20 – 25 minutes), stirring occasionally until golden brown and soft. Set aside.
Sauté the Mushrooms : In the same pan, add a touch more oil if needed. Cook mushrooms 6 – 8 minutes until browned and moisture has evaporated. Add herbs, salt, and pepper. Remove from heat.
Prepare the Crust : Preheat oven to 450°. Roll or stretch dough into a 12-inch round or rectangle. Place on parchment-lined baking sheet or pizza stone and brush with olive oil.
Assemble : Spread caramelized onions evenly over crust. Add sautéed mushrooms and top with shredded fontina.
Bake : Bake 10 – 13 minutes, until crust is golden and cheese is melted and bubbling.
Finish : Drizzle lightly with truffle oil, sprinkle with flaky sea salt, and garnish with microgreens or arugula if desired.
Serve : Slice and enjoy immediately while warm and crisp.
TIPS FOR SUCCESS
Use a pizza stone for the crispiest crust.
Don’t overcrowd mushrooms. Cook in batches if needed to get that golden sear.
Prep onions ahead : caramelized onions can be made up to 3 days in advance and refrigerated.
STORAGE TIPS
Store leftovers in the fridge for up to 2 days. Reheat in a hot oven (400°F) for the best results.
Avoid microwaving – flatbread will lose its crispness.
FREQUENTLY ASKED QUESTIONS
What mushrooms work best?
A blend of shittake, cremini, and oyster mushrooms all create depth of flavor, but you can use any mix.
Can I use another cheese?
Yes! Gruyère, mozzarella, or even gorgonzola pair beautifully with mushrooms.
Do I have to use truffle oil?
No, it’s optional, but it adds a luxurious finish. A drizzle of good extra virgin olive oil also works.
Can this be prepped ahead?
Yes, caramelize the onions and sauté the mushrooms a day in advance, then assemble and bake when ready to serve. You can also prepare the flatbread dough a day in advance and refrigerate overnight after the first rise.
This recipe truly is a showstopper. Rich, savory, and balanced with just enough to impress any guest. Pair with a crisp white wine or sparkling beverage and you’ve got a dish that feels like it belongs on a restaurant menu. If you try it, be sure to tag me or leave a comment below!
HOSTING TIP
Serve cut into rustic squares on a wooden board, alongside olives and charcuterie for a complete spread
Caramelize the Onions : Heat butter and olive oil in a skillet over medium heat. Cook onions slowly (20 – 25 minutes), stirring occasionally until golden brown and soft. Set aside.
Sauté the Mushrooms : In the same pan, add a touch more oil if needed. Cook mushrooms 6 – 8 minutes until browned and moisture has evaporated. Add herbs, salt, and pepper. Remove from heat.
Prepare the Crust : Preheat oven to 450°. Roll or stretch dough into a 12-inch round or rectangle. Place on parchment-lined baking sheet or pizza stone and brush with olive oil.
Assemble : Spread caramelized onions evenly over crust. Add sautéed mushrooms and top with shredded fontina.
Bake : Bake 10 – 13 minutes, until crust is golden and cheese is melted and bubbling.
Finish : Drizzle lightly with truffle oil, sprinkle with flaky sea salt, and garnish with microgreens or arugula if desired.
Serve : Slice and enjoy immediately while warm and crisp.
Sub rosemary for thyme, or swap fontina for Gruyère or mozzarella.
Prep caramelized onions ahead to save time.
Prep Time:30 – 35 minutes
Cook Time:10 -13 minutes
Category:Appetizer, Main Dish
Method:Baked
Cuisine:Italian-Inspired
Caitlin Lindsey
post author
Caitlin is the creative visionary behind Fit to Entertain, where food, wellness, and intentional living come together. She's passionate about helping others bring joy to the table and live beautifully - one meal at a time.
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