Q1: Can I use a different size baking dish if I don't have a 9x9-inch pan?

Yes, you can substitute with alternative baking dishes, though cooking times may vary. An 8x8-inch dish will work but will create thicker frittata squares that may need an additional 5-7 minutes of baking time (beyond Step 11's initial timing). A 9x13-inch pan will create thinner squares that cook faster, so reduce baking time by about 5 minutes and check for doneness earlier. Whatever dish you use, make sure to grease it thoroughly with olive oil as instructed in Step 2 to prevent sticking, and adjust the toothpick test mentioned in the later steps accordingly.

Q2: How do I know when the frittata is fully cooked and ready to come out of the oven?

The recipe indicates using a toothpick test (see Equipment list) to check for doneness. Insert a toothpick into the center of the frittata—it should come out clean or with just a few moist crumbs, not wet egg mixture. Additionally, the frittata should be set in the center with no jiggling when you gently shake the pan, and the edges should be lightly golden brown and pulling slightly away from the sides of the baking dish. The surface should appear puffed and firm to a gentle touch. At 375°F as specified in Step 1, this typically takes the full baking time, but ovens vary, so start checking a few minutes before the timer goes off.

Q3: Can I substitute the fresh mozzarella with regular shredded mozzarella cheese?

Yes, you can substitute shredded mozzarella for the 8 oz of fresh mozzarella called for in the ingredients, though the texture will be slightly different. Fresh mozzarella (diced into 1/2-inch cubes as instructed in Step 4) creates creamy pockets throughout the frittata, while pre-shredded mozzarella will melt more uniformly and create a slightly drier texture. If using shredded mozzarella, you'll need about 2 cups and can skip Step 4 entirely, adding it directly to the egg mixture in Step 8. Keep in mind that pre-shredded cheese contains anti-caking agents that may affect the final texture, so freshly shredded from a block is preferable if possible.

Q4: What can I substitute for whole milk to make this recipe dairy-free or lower in fat?

You have several options for substituting the 1/4 cup of whole milk listed in the ingredients. For a lower-fat version, you can use 2% milk, 1% milk, or even skim milk without significantly affecting the texture, though the frittata may be slightly less rich. For a dairy-free alternative, unsweetened almond milk, oat milk, or cashew milk work well when whisked with the eggs in Step 6. However, note that you'll still need to address the fresh mozzarella and Parmesan cheese (Steps 4 and 8) if making this fully dairy-free—consider using dairy-free cheese alternatives, though this will change the authentic Caprese flavor profile. The milk substitute should be added in the same quantity and whisked vigorously for 30 seconds as directed in Step 7.

Mini Caprese Frittata Squares

These Mini Caprese Frittata Squares bring the beloved flavors of Italy's iconic Caprese salad into a portable, protein-packed breakfast format. Inspired by the sun-drenched island of Capri where the classic tomato, mozzarella, and basil combination originated, this gluten-free frittata transforms those fresh Mediterranean ingredients into a satisfying meal you can enjoy hot from the oven or cold on the go.

What makes these frittata squares truly special is their versatility and convenience. Baked in a single pan and cut into neat portions, they're perfect for meal prep, picnics, lunchboxes, or busy mornings when you need a nutritious breakfast without the fuss. The eggs provide a rich, creamy base that holds together beautifully, while the cherry tomatoes burst with sweetness, fresh mozzarella melts into pockets of creamy goodness, and aromatic basil adds that signature Italian brightness.

Unlike traditional frittatas that require stovetop-to-oven techniques, this simplified version bakes entirely in the oven, making it foolproof for cooks of any skill level. The result is a golden, fluffy egg dish with a tender texture and balanced flavors that taste just as delicious at room temperature as they do warm. Each square delivers approximately 12 grams of protein, making them an excellent choice for anyone following a gluten-free lifestyle who wants a nutritious, satisfying meal that travels well and keeps you energized throughout the morning.

Julia

Recipe Author: Gluten-Free & Specialty Diet Chef

Nutrition

40 minutes

None servings

185 calories

Fat 13.00g

Carbs 3.00g

Protein 14.00g

Ingredients

10 None	large eggs
1/4 cup	whole milk
3/4 tsp	salt
1/4 tsp	black pepper, freshly ground
8 oz	fresh mozzarella cheese, diced into 1/2-inch cubes
1 cup	cherry tomatoes, halved
1/3 cup	fresh basil leaves, chopped
1/4 cup	Parmesan cheese, grated
1 tbsp	olive oil, for greasing pan
1/4 tsp	garlic powder (optional)

Equipment

Cutting board

Whisk

measuring spoons

measuring cups

large mixing bowl

sharp knife

grater

spatula

toothpick

9x9-inch baking dish

Clean Eating

Fully compliant with clean eating principles, using only whole, minimally processed ingredients like fresh eggs, mozzarella, tomatoes, and herbs. No artificial additives or refined ingredients are present in this wholesome recipe.

Gluten-Free Diet

Naturally gluten-free, this recipe uses whole ingredients like eggs, cheese, and vegetables without any gluten-containing grains. The description specifically highlights its gluten-free status, making it safe for those with gluten sensitivities.

Intermittent Fasting

Perfect for intermittent fasting with its high-protein, nutrient-dense profile that provides sustained energy. The balanced combination of proteins, healthy fats, and vegetables makes it an ideal meal during eating windows.

Ketogenic Diet

An excellent keto option with high fat content from eggs and mozzarella, minimal carbohydrates from vegetables, and moderate protein. The recipe provides approximately 12 grams of protein and uses low-carb ingredients like cherry tomatoes and fresh herbs.

Mediterranean Diet

This recipe perfectly embodies Mediterranean diet principles with its use of extra virgin olive oil, fresh eggs, mozzarella, tomatoes, and basil. The focus on whole ingredients, herbs, and healthy fats aligns beautifully with Mediterranean nutritional guidelines.

Instructions

Preheat the oven to 375°F (190°C).

Grease a 9x9-inch baking dish thoroughly with olive oil, making sure to coat the bottom and sides completely to prevent sticking.

1 min

Halve the cherry tomatoes by cutting them in half lengthwise with a sharp knife.

3 min

Dice the fresh mozzarella cheese into 1/2-inch cubes using a sharp knife.

2 min

Chop the fresh basil leaves roughly, keeping some pieces slightly larger for better flavor distribution.

2 min

Crack the eggs into a large mixing bowl and add the milk, salt, black pepper, and garlic powder if using.

2 min

Whisk the egg mixture vigorously for about 30 seconds until well combined, frothy, and uniform in color.

1 min

Add the diced mozzarella, halved cherry tomatoes, chopped basil, and grated Parmesan to the egg mixture.

1 min

Gently fold all ingredients together with a spatula until evenly distributed throughout the egg mixture.

1 min

Pour the egg mixture into the prepared baking dish, spreading it evenly and ensuring ingredients are distributed across the surface.

1 min

Place the baking dish in the preheated oven and bake for 25-28 minutes, until the frittata is set in the center, golden on top, and a toothpick inserted in the middle comes out clean.

27 min

Remove the frittata from the oven and let it cool in the pan for 5-10 minutes to set completely and make cutting easier.

7 min

Cut the frittata into 9 equal squares using a sharp knife, wiping the blade between cuts for clean edges.

2 min

Serve the frittata squares warm, at room temperature, or chilled. Store leftovers in an airtight container in the refrigerator for up to 4 days.

Mini Caprese Frittata Squares

Nutrition

Ingredients

Equipment

On Diet

Clean Eating

Gluten-Free Diet

Intermittent Fasting

Ketogenic Diet

Mediterranean Diet

Instructions

Frequently Asked Questions

Q1: Can I use a different size baking dish if I don't have a 9x9-inch pan?

Q2: How do I know when the frittata is fully cooked and ready to come out of the oven?

Q3: Can I substitute the fresh mozzarella with regular shredded mozzarella cheese?

Q4: What can I substitute for whole milk to make this recipe dairy-free or lower in fat?