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1
For the onions: Heat a skillet over medium heat, and add the olive oil and onions.
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2
Cook for about 20-30 minutes, stirring occasionally until the onions are soft and starting to turn a golden brown color (caramelized).
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3
Add the salt, pepper and brown sugar, and stir until combined.
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4
De-glaze the pan by stirring in the stout, and cook until all of the beer is absorbed, about 4-5 minutes.
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5
Set aside.
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6
For the mushrooms: To clean the morels, start by cutting them in half.
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7
Quickly run under cool water, and use a soft-bristled toothbrush to clean their numerous little cavities and rid them of any grit.
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8
Dry them gently with paper towels.
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9
Place the mushrooms in a small bowl, and sprinkle in the flour.
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10
Cover with plastic wrap,and shake gently to coat.
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11
Bring a skillet up to temperature on medium heat, then add the butter.
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12
Add the mushrooms, and cook, stirring gently for about 7 minutes.
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13
Season with salt and parsley, gently stir again, remove from heat and place mushrooms in a bowl for later use.
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14
For the burgers: Shape the ground beef into four equal patties (should be 6 ounces each), and indent the middle with your finger (prevents against burger bulge).
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15
Return the mushroom pan to the stove and bring it up to its highest temperature.
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16
You should have enough residual butter in there for the burgers.
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17
Turn on your broiler also.
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18
While the pan comes up to temperature, season the patties with salt and pepper.
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19
Add burgers into the hot pan.
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20
Sear the burgers for three minutes on each side for a medium burger (longer for more well done), and place on a rimmed cookie sheet.
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21
Top the burgers with the sliced cheese, and place under the broiler until the cheese is just melted, about 1-2 minutes, depending on how melted you like your cheese.
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22
Remove from oven.
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23
Split the burger buns, and build up your burger with the patty on the bottom bun, then top it with stout glazed onions and finally the mushrooms.
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24
Top with the crown of the bun and devour the monster!