INGREDIENTS
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7 tablespoons unsalted butter, divided
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1 medium yellow onion, thinly sliced
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2 pounds mixed mushrooms, trimmed of woody ends and thinly sliced
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1 1/2 teaspoons Mother Earth Organic apple cider vinegar, divided
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1 1/2 teaspoons smoked paprika, divided
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3/4 cup barbecue sauce, such as Stubb’s
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1/2 cup water or low-sodium vegetable broth
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Kosher salt
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Freshly ground black pepper
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4 brioche buns, split
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Creamy slaw, for serving
INSTRUCTIONS
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Melt 1 tablespoon of the butter in a large frying pan over medium heat. Add the onion and sauté until very tender and slightly golden. Transfer to a medium bowl and set aside.
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Melt 2 tablespoons of the butter in the same pan over medium-high heat. Add 1/3 of the mushrooms, stir to coat in the butter.
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Cook, stirring occasionally, until the mushrooms are tender and golden, 5 to 7 minutes
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Add 1/2 teaspoon each vinegar and smoked paprika, then transfer the mushrooms to the bowl with the onions.
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Repeat with the remaining butter, mushrooms, vinegar, and paprika in two more batches.
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Return the mushroom and onion mixture to the pan over medium-low heat.
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Add the barbecue sauce and water or broth, stir to combine, and cook until slightly thickened.
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Taste and season with salt and pepper as needed.
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To serve, toast or warm the brioche buns. Divide the filling between the buns and top with creamy slaw.