Buttery Croissant and Prosciutto Breakfast Strata Tips, FAQ & printable recipe

Tips for success

For an even more flavorful result, you can prepare the egg custard base up to an hour before you plan to assemble the strata. Store it in the refrigerator until you are ready to pour it over the layered ingredients. This allows the Dijon mustard and cream to fully integrate with the eggs, resulting in a more robust flavor profile. Just remember to give the mixture a quick whisk again before pouring, as some separation may occur while it sits in the cold environment.

When garnishing, use fresh thyme leaves to provide a bright, herbaceous note that cuts through the richness of the cheese and cream. The lemon zest is equally important, adding a subtle citrus brightness that elevates the entire dish.

Add these fresh elements only after the strata has finished cooking and has rested for a few minutes. This keeps the herbs vibrant and prevents the zest from losing its essential oils to the heat, ensuring the final presentation is as beautiful as it is delicious.

Variations

• Vegetarian Spinach Strata: Replace the prosciutto with two cups of fresh baby spinach leaves. Sauté the spinach briefly until wilted before layering to ensure excess moisture is removed, then proceed with the recipe as instructed.
• Smoked Salmon Variation: Omit the prosciutto and add 4 ounces of smoked salmon ribbons after the strata has finished cooking. The gentle residual heat will warm the salmon without overcooking it, preserving its delicate flavor.

Storage and make-ahead

Fridge

Store in an airtight container in the refrigerator for up to 3 days.

Freezer

Not recommended, as the texture of the custard and croissants changes significantly upon thawing.

Reheat

Reheat individual portions in a microwave-safe dish on medium power until warmed through or in a 300°F oven until the edges crisp up again.

Store any leftover strata in an airtight container in the refrigerator for up to three days. To maintain the best texture, try to keep the croissant pieces as intact as possible. When ready to eat again, ensure the leftovers are cooled completely within two hours of cooking before placing them in the fridge. This practice helps maintain food quality and safety. Avoid leaving the strata at room temperature for an extended period, as the egg and dairy components are highly perishable.

While this recipe is designed to be assembled and cooked immediately, you can prep the ingredients ahead of time. Keep the torn croissants, prosciutto, and asparagus in separate containers in the refrigerator, and whisk the custard separately.

Assemble the layers and pour the custard just before starting the slow cooker. This method saves significant time in the morning while ensuring the bread remains fresh and the custard does not become overly soggy before the cooking process begins.

Serving ideas

Serve the strata directly from the slow cooker for a casual, family-style brunch. Use a large serving spoon to scoop out generous portions, ensuring each serving includes a mix of the crispy croissant tops and the custardy bottom.

The dish is hearty enough to stand alone, but it pairs beautifully with a simple side salad of bitter greens or fresh seasonal fruit to provide a refreshing contrast to the richness of the Fontina and gruyere cream. It is best enjoyed immediately while warm.

If serving for a more formal brunch, you can carefully lift individual portions onto plates using a wide spatula. Be gentle to keep the layers intact. Garnish each portion with extra fresh thyme and a light sprinkle of lemon zest to enhance the visual appeal.

Ensure the plates are warm, as this helps keep the cheese melted and the custard texture pleasant for longer. This presentation makes the dish look like it was prepared in a professional kitchen, perfect for entertaining guests.

Frequently asked questions

Recipe card

Buttery Croissant and Prosciutto Breakfast Strata

Prep 15 minCook 3 hRest 10 minTotal 3 h 25 minServes 6

Ingredients

• 6 day-old butter croissants, torn into chunks
• 4 oz prosciutto, torn into ribbons
• 1 bunch asparagus, trimmed and cut into spears
• 1 cup Fontina cheese, shredded
• 1/2 cup Parmigiano cheese, grated
• 8 large eggs
• 1 cup gruyere cream
• 1 tbsp Dijon mustard

Instructions

1. Begin by tearing the six day-old butter croissants into rough, bite-sized chunks. In your ceramic slow cooker insert, start building the base by arranging a portion of the torn croissants, followed by a layer of prosciutto ribbons, fresh asparagus spears, shredded Fontina, and grated Parmigiano. Continue alternating these layers until all components are used, ensuring an even distribution of the ingredients throughout the vessel to create a cohesive structure for the final bake.
2. In a medium mixing bowl, combine the eight large eggs with the cup of gruyere cream and the tablespoon of Dijon mustard. Whisk the mixture vigorously until the eggs are completely broken down and the cream is fully incorporated, resulting in a smooth, uniform liquid. Pour this custard mixture evenly over the layered ingredients in the slow cooker, making sure to coat the croissant pieces thoroughly so they absorb the liquid for a rich, custardy finished texture.
3. Place a clean kitchen towel under the slow cooker lid before securing it. This simple trick absorbs excess condensation, preventing moisture from dripping back onto the strata and ensuring the top croissant peaks remain crisp while the bottom base becomes perfectly custardy. Set the slow cooker to LOW and cook for three hours. To ensure the eggs are fully cooked through, verify the internal temperature of the egg custard reaches 160°F (71°C). Serve warm, garnished with fresh thyme and lemon zest.

Contains: gluten, eggs, milk, mustard

Food safety: The eggs in this dish are served soft and custardy. Use pasteurised eggs for pregnant women, young children, older adults and anyone with a weakened immune system.

Estimated nutrition per serving

Calories

420

Protein

18.5 g

Carbohydrates

28 g

Fat

26 g

Fiber

1.5 g

Sugar

4 g

Sodium

780 mg

Automatic estimate from the ingredient list, not laboratory-verified.