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5 from 7 votes

Portabella Mushroom & Pesto Egg-in-a-Hole

This dairy-free portabella mushroom & pesto egg-in-a-hole is a crazy easy breakfast, brunch, or weeknight dinner. I'm going through a pesto phase right is delicious on everything! Plus, I am answering the it portabella or portobello?
Course Breakfast
Cuisine American, Italian
Prep Time 5 minutes
Cook Time 25 minutes
Total Time 30 minutes
Servings 4
Calories 328kcal
Author Candice


  • 4 large portabella mushrooms stems removed
  • salt to taste
  • pepper to taste
  • 2 tbsp avocado oil or other flavorless oil
  • 4 oz. fresh basil stemmed
  • 2 cloves garlic peeled & cut in half
  • 1/4 cup toasted pine nuts
  • 1/4 cup olive oil
  • 4 eggs
  • pickled jalapeƱos or hot sauce (optional)


  • Preheat to 450F.
  • Place the mushrooms, gill side up, on a baking sheet. lightly oil the top and bottom. Sprinkle with salt & pepper. Roast 15 minutes.
  • In the meantime, make your pesto. Add the basil, garlic, pine nuts, salt & pepper to a food processor. With the processor running, pour in your 1/4 cup of olive oil. Season with salt and pepper to taste.
  • Pull your mushrooms out of the oven and add a spoonful of pesto to the inside of each mushroom cap. Use the back of the spoon to make a concave cup in the pesto. Crack an egg into the pesto. Return to the oven for ~8 minutes, when the egg white is opaque and cooked.
  • Remove from oven, season with salt and pepper, and serve immediately. Serve with pickled jalapeƱos or hot sauce!


Calories: 328kcal | Carbohydrates: 5g | Protein: 9g | Fat: 30g | Saturated Fat: 4g | Cholesterol: 163mg | Sodium: 71mg | Potassium: 500mg | Fiber: 1g | Sugar: 2g | Vitamin A: 1735IU | Vitamin C: 5.6mg | Calcium: 80mg | Iron: 2.5mg