Key Lime Pie Overnight Oats Recipe for Creamy Citrus Breakfast

These Key Lime Pie Overnight Oats are a breakfast that tastes like dessert—creamy, tangy, and perfectly sweet. Each serving delivers 13 grams of protein and 7 grams of fibre, requires no cooking, and is ready after a quick overnight chill. Prepare the night before and enjoy a bright, refreshing jar of oats in the morning.

I first shared these on Instagram and the response was immediate—everyone wanted the recipe. If you enjoy fruity overnight oats like my strawberry or banana versions, you’ll love this citrus-forward option. Mix everything the night before, refrigerate, and wake up to a dessert-like breakfast with bright lime flavor and a creamy texture.

Matcha is optional but provides a pretty pale green color that enhances the key-lime vibe.

Recipe Highlights

• Protein & fibre: Each serving contains about 13 g protein and 7 g fibre to keep you satisfied until lunchtime.
• Easy meal prep: Mix the ingredients the night before—no cooking required.
• Fresh, bright flavour: Lime juice, zest, and Greek yogurt create the signature sweet-tart profile.
• Minimal ingredients: Pantry-friendly items come together in one jar for maximum payoff.

Key Ingredients & Substitutions

• Oats: Use old-fashioned rolled oats for the best texture; quick oats will be softer.
• Greek yogurt: Plain Greek yogurt adds creaminess and tang. For a dairy-free option, substitute thick coconut yogurt.
• Lime juice & zest: Key limes have a slightly floral note, but regular limes work perfectly if key limes aren’t available.
• Matcha powder (optional): About 1/2 teaspoon adds a gentle green hue without altering the flavor significantly.

How To Make Key Lime Pie Overnight Oats

Step 1: Add oats, chia seeds, Greek yogurt, lime zest, and matcha (if using) to a bowl or jar.

Step 2: Add milk, lime juice, maple syrup, and vanilla extract.

Step 3: Stir until everything is well combined.

Step 4: Cover and refrigerate for at least 4 hours or overnight. In the morning, stir and top with extra Greek yogurt and crushed graham crackers just before serving.

How To Store

Keep overnight oats in a sealed jar or airtight container in the refrigerator for up to 4 days. Add graham cracker crumbs only when serving so they stay crisp.

Jess’s Tips

• Add graham crackers at serving: That keeps them crunchy.
• Use fresh lime juice: Fresh juice brightens the flavor more than bottled.
• Taste and adjust: Before refrigerating, tweak sweetness or lime to suit your preference.
• Matcha for color: A small amount adds a lovely green hue without a strong matcha taste.
• Make extra for meal prep: The recipe scales easily—double or triple to prepare breakfast for the week.

Frequently Asked Questions