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Mushroom Appetizer

A baked appetizer of sautéed onions and mushrooms topped with mozzarella, parmesan, and processed cheese on bread squares.

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Why it works: Mozzarella cheese and parmesan cheese match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,093 recipes. Both carry ethyl 2-methylbutyrate, which smells fruity, apple. The science ↓

Mushroom Appetizer

Oven350°F
Time20 to 25 minutes

Ingredients

Directions

Make the filling

  1. Melt butter in a large frying pan and add the onions and mushrooms, then saute until soft.

  2. Add mozzarella, parmesan, parsley, egg, salt, and pepper. Cook for 1 minute and remove from heat.

Assemble and bake

  1. Roll each crustless slice of bread to flatten it. Butter each piece and cut each slice into 4 square pieces.

  2. Press bread pieces, buttered side down, into a tiny muffin tin.

  3. Fill each bread cup with the mushroom mixture.

  4. Cut the three cheese slices into 16 pieces each (48 pieces total) and place a piece on top of each tartlet.

  5. Bake at 350°F for 20 to 25 minutes.

Nutrition, whole recipe (rough)

1014Calories
47 gProtein
41 gFat
113 gCarbs
What these numbers assume: 12 portions
IngredientPortion assumedkcal
Flour1 cup (125g) all-purpose455
Processed Cheese1 oz (28g) cheddar113
Parmesan Cheese1 oz (28g)110
Butter1 tbsp (14g)102
Mozzarella Cheese1 oz (28g)85
Egg1 large egg (50g)78
Onion1 medium (110g)44
Mushroom1/2 cup sliced (35g)15
Black Pepper1 tsp ground (2.3g)6
Oregano1 tsp dried (1.8g)5
Parsley1 tbsp chopped fresh (3.8g)1
Salt1 tsp (6g)0

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

Recipe from the Recipes Wiki (Fandom).

Steps grouped into stages for easier reading; the method is the source's own.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Smell alikestrong
    Cooked together1,093 recipes

    Shared aroma: ethyl 2-methylbutyrate (fruity, apple).

  2. Parsley + oreganotop 2% of all pairs
    Smell alikestrong
    Cooked together1,184 recipes

    Shared aroma: estragole (anise, licorice).

  3. Mushroom + parmesan cheesetop 6% of all pairs
    Smell alikemoderate
    Cooked together1,199 recipes

    Shared aroma: methyl 2-methylbutyrate (apple, fatty).

  4. Butter + mushroomtop 7% of all pairs
    Smell alikemoderate
    Cooked together12,525 recipes

    Shared aroma: trans-2-decenal (waxy, orange).

  5. Butter + parmesan cheesetop 9% of all pairs
    Smell alikemoderate
    Cooked together4,163 recipes

    Shared aroma: guaiacol (smoky, sweet).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Bread
Forms the crisp, buttery cup that holds the filling while it bakes.
Mushrooms
Supply savory, earthy bulk and moisture to the filling.
Mozzarella cheese
Melts into the filling to bind it and give a stretchy texture.
Parmesan cheese
Adds salty, savory depth and helps the filling brown on top.
Egg
Binds the cheese and mushroom mixture so it holds together in the cups.
Butter
Adds richness and helps the bread crisp and brown in the oven.

The step that matters

Pressing the buttered bread into the muffin tin. Buttered side down helps the bread crisp and brown into a sturdy cup; if the bread is not pressed firmly, the cup can slump and let the filling spill out as it bakes.

Swap the oregano

How well each one fits the dish's main ingredients (butter, onion, mushroom, mozzarella cheese, parmesan cheese, parsley, egg):

  1. Garlicfits better
  2. Thymefits better
  3. Capersfits better
  4. Oreganothe original

Fit is the average pairing score against butter, onion, mushroom, mozzarella cheese, parmesan cheese, parsley, egg. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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