Caramelized Sweet Onion with Blue Cheese Pastry Galette

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Caramelized Sweet Onion with Blue Cheese Pastry Galette is bursting with flavor from the caramelized sweet onions and creamy muenster cheese. All these wonderful flavors are hugged in a flaky crust that has blue cheese throughout.

Caramelized Sweet Onion with Blue Cheese Pastry Galette

Are you asking yourself what is the difference in a galette and a tart? A galette is a free form, flat pastry. I think of it as being ‘rustic’. You just lay the pastry out, put your filling in the center, and fold the sides up to contain the filling. A tart is a baked dish that has sides and has a sweet or savory filling over a pastry crust. It does not contain to the top layer of pastry. In the U.S., we commonly refer to a tart as a pie.

I kind of like this dish to look rustic, but you could put the Blue Cheese Pastry crust into a pie pan and bake the recipe in pie form.

Caramelized Sweet Onion with Blue Cheese Pastry Galette

Caramelized Sweet Onion with Blue Cheese Pastry Galette

I enjoyed a Blue Cheese and Walnut Tart a couple of years ago while on vacation at the beach. I’ve tried to duplicate it several times. Even though I’ve created some good tarts and galettes none of them have been spot on to that tart.

Working on developing that tart is how this Caramelized Sweet Onion with Blue Cheese Pastry Galette came to be. As a result of trying to recreate that tart, I’ve developed a really good blue cheese pastry. It’s flaky and buttery. It’s savory, not sweet; it makes the perfect wrapper for these caramelized onions.

I must disclose to you, however, that this galette (tart) is very rich. I would serve it as a starter or as part of a cheese tray. Even as an appetizer, it almost needs a little salad topper or red grapes. It’s really good with wine. The blue cheese and acidic wine combo works well – have you ever heard that wine and cheese are best friends? This is proof they are!

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Caramelized Sweet Onion with Blue Cheese Pastry Galette

Caramelized Sweet Onion with Blue Cheese Pastry Galette

This galette is rich and flavorful. Best served in small portions as an appetizer. Top with baby salad greens and vinaigrette dressing, red grapes or serve with a cheese tray. Great with red wine.
Author: Paula
5 from 12 votes
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Prep Time: 25 minutes
Cook Time: 30 minutes
Total Time: 55 minutes
Servings: 12 servings
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  • 1 and 1/4 cups all-purpose flour
  • 1/2 teaspoon salt
  • 1 and 1/2 teaspoon sugar
  • 8 Tablespoon butter very cold unsalted, cut into pieces
  • 1/3 cup ice water
  • 3 ounces blue cheese crumbled


  • 4 cups sweet onion sliced thin (I used Vidalia)
  • 2 Tablespoons coconut oil
  • 1 cup muenster cheese grated
  • 1 large egg
  • 1/2 cup heavy cream
  • 2 Tablespoons all-purpose flour
  • 2 teaspoons minced garlic
  • 1 teaspoon thyme
  • 1/2 teaspoon salt
  • 1/2 teaspoon pepper



  • Add flour, salt, and sugar to a food processor. Pulse 6 times. Add butter and pulse 12-13 one-second pulses until the mixture resembles coarse meal. You'll see pea-size pieces. Add blue cheese and 1 T water. Pulse just 4 to 5 one-second pulses to incorporate. Add another tablespoon of water and pulse again. Keep adding water a little at a time, when the dough begins to clump together, dump onto a sheet of waxed paper and form into a ball. Add a sprinkle of water if the dough won't stick together and form a solid 4-inch disc. Work quickly. Wrap in plastic wrap and refrigerate 30 minutes or up to 2 days.
  • When ready to bake, roll dough into a 13-inch circle and place on a cookie sheet or pizza pan. Place filling of choice in the center, spread evenly, and fold edges over. Bake.


  • Heat a large skillet to medium-low. Add coconut oil and heat. Add onions, saute until translucent, about 20 minutes. Add garlic, thyme, salt, and pepper. Stir. *You may need to add 1 to 2 more tablespoons of oil. If so add it now and allow it to melt. Then add flour and stir constantly 2 minutes. Whisk egg and cream together. Add heavy cream and egg mixture; stir 1 to 2 minutes until the mixture becomes thick.
  • Pour into the center of the Blue Cheese Pastry (that has been rolled to 13-inch diameter and explained in the above recipe) and spread evenly to 1 and 1/2 inches from the side. Evenly sprinkle cheese over top of onion mixture. Fold up the crust around the onions.
  • Bake 25 to 30 minutes at 350 degrees until cheese is bubbly and crust is golden brown. Cool on a wire rack slightly, transfer to a serving dish and serve immediately.


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Calories: 259kcal | Carbohydrates: 16g | Protein: 6g | Fat: 19g | Saturated Fat: 12g | Cholesterol: 64mg | Sodium: 433mg | Potassium: 121mg | Fiber: 1g | Sugar: 3g | Vitamin A: 559IU | Vitamin C: 3mg | Calcium: 129mg | Iron: 1mg
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