I couldn’t believe how a handful of sautéed mushrooms, a smear of mustard, fresh thyme and melted Swiss turned plain bread into the kind of savory, cheesy open-faced sandwich I want for every meal.
I can’t shut up about this toast because it hits every savory nerve I have. I adore the way the topping browns and becomes wildly meaty, all piled on toast and sealed under gooey Swiss cheese.
The garlic sharpens things, not politely but in a grab-you-by-the-cheek way. I crave the steam when you lift the melted cheese and the way juices bead at the edge of the toast.
But it’s simple, unpretentious food that somehow feels decadent. Small meal, big attitude.
I will make this again tomorrow. No fuss, serious savory cheese satisfaction every bite, and I want it now.
Ingredients
- Crusty bread: crunchy base, soaks up mushroom juices.
- Mushrooms: meaty texture, earthy flavor, kinda like comfort food.
- Butter: gives richness and that silky mouthfeel.
- Olive oil: helps cook and adds a light fruitiness.
- Garlic: fragrant punch, it wakes the whole toast up.
- Dijon mustard: sneaky tang, ties butter and mushrooms together.
- Thyme: herbal note, small but it matters.
- Swiss cheese: melty, nutty, makes everything cozy and gooey.
- Black pepper: little bite, wakes up the creaminess.
- Sea salt: brings out mushroom flavor, don’t skip it.
- Basically lemon: optional bright note, cuts richness.
- Plus parsley: fresh pop of green and color.
- Red pepper flakes: tiny heat if you want a kick.
Ingredient Quantities
- 4 slices crusty bread (sourdough or country, about 1/2 inch thick)
- 10 oz (280 g) cremini or white mushrooms, cleaned and sliced
- 2 tbsp unsalted butter
- 1 tbsp olive oil
- 3 cloves garlic, minced (about 1 1/2 tsp)
- 1 tsp Dijion mustard
- 1 tsp fresh thyme leaves, packed (or 3 small sprigs)
- 4 oz Swiss cheese, thinly sliced or 1 to 1 1/4 cups grated
- 1/4 tsp black pepper, or to taste
- 1/2 tsp fine sea salt, plus more if needed
- 1 tsp lemon juice (optional, but brightens the mushrooms)
- 1 tbsp chopped fresh parsley for garnish (optional)
- Pinch of red pepper flakes (optional, if you like a little heat)
How to Make this
1. Preheat your oven broiler to high and arrange an oven rack 6 to 8 inches from the heat, or preheat a toaster oven if you have one. Lightly toast the 4 slices of crusty bread until just golden, set aside.
2. Heat a large skillet over medium high heat, add 2 tbsp butter and 1 tbsp olive oil. When the butter foams, add the sliced mushrooms in a single layer so they brown instead of steam.
3. Let mushrooms cook undisturbed for 2 to 3 minutes, then stir and cook another 3 to 4 minutes until they’re nicely browned and any liquid has evaporated.
4. Lower heat to medium, add the minced garlic, 1 tsp fresh thyme leaves, 1/4 tsp black pepper, 1/2 tsp fine sea salt, and a pinch of red pepper flakes if using. Cook 30 to 60 seconds until fragrant, don’t burn the garlic.
5. Stir in 1 tsp Dijon mustard and 1 tsp lemon juice if using, toss to coat mushrooms and deglaze the pan a bit. Taste and adjust salt or pepper as needed.
6. Spoon the mushrooms evenly over the toasted bread slices, packing them slightly so they stay put.
7. Top each mushroom pile with about 1 oz of Swiss cheese or a generous handful if grated so each slice is well covered.
8. Place the toasts on a baking sheet and broil 1 to 3 minutes until the cheese is melted and bubbling and edges of the bread are crisp. Watch closely so they don’t burn.
9. Remove from oven, sprinkle with 1 tbsp chopped fresh parsley and a few extra thyme leaves if you like, let cool a minute and serve warm.
Equipment Needed
1. Oven with broiler or a toaster oven
2. Large skillet (nonstick or stainless)
3. Baking sheet
4. Spatula or wooden spoon
5. Chef’s knife
6. Cutting board
7. Cheese grater or thin-blade slicer
8. Measuring spoons
9. Small bowl or dish (for mustard, lemon, herbs)
10. Tongs or a fork for arranging toasts
FAQ
Simple Garlic Swiss Mushrooms On Toast Recipe Substitutions and Variations
- For the mushrooms: swap cremini for shiitake or oyster mushrooms — they give a meatier, earthier bite and hold up well when sautéed.
- For the Swiss cheese: use Gruyère or fontina instead — both melt silky and add a nuttier flavor; if you want milder, use mozzarella.
- For the butter + olive oil: use ghee or avocado oil if you need higher smoke point or a lactose free option; ghee adds a toasty, rich note.
- For the Dijon mustard: use whole grain mustard or a teaspoon of mayo plus a squeeze of lemon if you don’t have Dijon — you’ll keep the tang and creaminess.
Pro Tips
1) Dry the mushrooms real good before cooking. If they’re wet they steam and never get that deep brown flavor. Cook in batches if you need to so they’re in a single layer, don’t crowd the pan or you’ll end up with soggy mushrooms.
2) Use both butter and oil, and get the pan hot so the mushrooms caramelize. Let them sit undisturbed for a few minutes before stirring, then scrape up the browned bits with your spatula — that fond is where the best flavor hides.
3) Toast the bread a bit more than you think, especially the crust edges, so it won’t go soggy under the mushrooms. Rub a cut clove of garlic over the warm toast for extra garlic flavor without overpowering it.
4) Grate the cheese fine or slice it thin so it melts fast and evenly. Broil close and watch the toasts the last minute, because they can go from perfect to burnt quick. Let them sit 30–60 seconds after coming out so the topping sets and doesn’t slide off.
Simple Garlic Swiss Mushrooms On Toast Recipe
I couldn't believe how a handful of sautéed mushrooms, a smear of mustard, fresh thyme and melted Swiss turned plain bread into the kind of savory, cheesy open-faced sandwich I want for every meal.
4
servings
318
kcal
Equipment: 1. Oven with broiler or a toaster oven
2. Large skillet (nonstick or stainless)
3. Baking sheet
4. Spatula or wooden spoon
5. Chef’s knife
6. Cutting board
7. Cheese grater or thin-blade slicer
8. Measuring spoons
9. Small bowl or dish (for mustard, lemon, herbs)
10. Tongs or a fork for arranging toasts
Ingredients
-
4 slices crusty bread (sourdough or country, about 1/2 inch thick)
-
10 oz (280 g) cremini or white mushrooms, cleaned and sliced
-
2 tbsp unsalted butter
-
1 tbsp olive oil
-
3 cloves garlic, minced (about 1 1/2 tsp)
-
1 tsp Dijion mustard
-
1 tsp fresh thyme leaves, packed (or 3 small sprigs)
-
4 oz Swiss cheese, thinly sliced or 1 to 1 1/4 cups grated
-
1/4 tsp black pepper, or to taste
-
1/2 tsp fine sea salt, plus more if needed
-
1 tsp lemon juice (optional, but brightens the mushrooms)
-
1 tbsp chopped fresh parsley for garnish (optional)
-
Pinch of red pepper flakes (optional, if you like a little heat)
Directions
- Preheat your oven broiler to high and arrange an oven rack 6 to 8 inches from the heat, or preheat a toaster oven if you have one. Lightly toast the 4 slices of crusty bread until just golden, set aside.
- Heat a large skillet over medium high heat, add 2 tbsp butter and 1 tbsp olive oil. When the butter foams, add the sliced mushrooms in a single layer so they brown instead of steam.
- Let mushrooms cook undisturbed for 2 to 3 minutes, then stir and cook another 3 to 4 minutes until they're nicely browned and any liquid has evaporated.
- Lower heat to medium, add the minced garlic, 1 tsp fresh thyme leaves, 1/4 tsp black pepper, 1/2 tsp fine sea salt, and a pinch of red pepper flakes if using. Cook 30 to 60 seconds until fragrant, don't burn the garlic.
- Stir in 1 tsp Dijon mustard and 1 tsp lemon juice if using, toss to coat mushrooms and deglaze the pan a bit. Taste and adjust salt or pepper as needed.
- Spoon the mushrooms evenly over the toasted bread slices, packing them slightly so they stay put.
- Top each mushroom pile with about 1 oz of Swiss cheese or a generous handful if grated so each slice is well covered.
- Place the toasts on a baking sheet and broil 1 to 3 minutes until the cheese is melted and bubbling and edges of the bread are crisp. Watch closely so they don't burn.
- Remove from oven, sprinkle with 1 tbsp chopped fresh parsley and a few extra thyme leaves if you like, let cool a minute and serve warm.
Notes
- Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.
Nutrition Facts
- Serving Size: 165g
- Total number of serves: 4
- Calories: 318kcal
- Fat: 16.7g
- Saturated Fat: 8.8g
- Trans Fat: 0.13g
- Polyunsaturated: 1.5g
- Monounsaturated: 5g
- Cholesterol: 40.5mg
- Sodium: 494mg
- Potassium: 312mg
- Carbohydrates: 28.3g
- Fiber: 2.5g
- Sugar: 2g
- Protein: 14.2g
- Vitamin A: 250IU
- Vitamin C: 1.5mg
- Calcium: 264mg
- Iron: 1.4mg
