Valentine Peanut Butter Blondies

Featured in Irresistible Sweet Treats.

Quick one-bowl peanut butter blondies studded with M&Ms. Mix, bake, and enjoy in about 30 minutes. Perfect for Valentine's Day or whenever you need a sweet treat.
Clare Greco
Updated on Mon, 17 Feb 2025 16:11:23 GMT
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I discovered this recipe during a late-night baking session when my daughter announced she needed treats for tomorrow's Valentine's party. What started as a panic-bake turned into our most-requested dessert. These blondies strike that perfect balance - chewy centers, slightly crisp edges, creamy peanut butter, and festive M&Ms that make everyone smile. They're what happens when a peanut butter cookie gets dressed up for Valentine's Day.

Let me tell you about the time I brought these to my son's basketball team party. These teenagers, who usually pretend they're too cool to care about anything, kept sneaking back to the dessert table. By the end of the night, three moms had texted me for the recipe. That's when I knew these blondies were something special.

Essential Ingredients

  • Real butter: needs to be melted but not browned - it's the foundation of flavor
  • Commercial peanut butter: makes all the difference - I learned the hard way that natural versions turn these oily
  • Light brown sugar: brings caramel notes and perfect chewiness
  • Fresh eggs: bind everything together beautifully
  • Pure vanilla extract: enhances every other flavor
  • All-purpose flour: creates the ideal structure
  • Valentine M&Ms: add color and crunch in every bite
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Blondie Magic

The Foundation:
Let's start with perfectly melted butter - not too hot or it'll scramble your egg
Blend:
Blend in peanut butter until it's silky smooth
Add:
Add brown sugar and watch the magic happen as it all comes together
Beat:
Beat in your egg and vanilla until the mixture looks glossy and inviting
The Build:
Fold in flour with a gentle touch - treat it like you're tucking in a baby
Sprinkle:
Sprinkle in those M&Ms like you're decorating a masterpiece
Press:
Press everything into your pan with loving care
Add:
Add extra M&Ms on top because more is more when it comes to candy
Final Glory:
Watch through the oven door as they turn golden
Test:
Test with a toothpick - a few moist crumbs are perfect
Let them cool:
Let them cool even though it's torture
Cut:
Cut into squares and try not to eat them all at once

Sweet Kitchen Wisdom

Let me tell you about these blondies after making them about a hundred times. They need to cool completely - I know it's torture watching them sit there, but trust me. One time I got impatient and cut them warm; they were delicious but messy. Now I make them the night before I need them. The texture actually gets better overnight, and those M&Ms stay perfectly crisp. That first bite of a properly cooled blondie? Pure heaven.

Making Them Your Own

Over countless batches, I've played around with this recipe more times than I can count. During Christmas, I use red and green M&Ms, and my kitchen looks like Santa's workshop. Sometimes I swirl in a ribbon of Nutella before baking - my kids go crazy for this version. Once, when I was feeling fancy, I browned the butter first. The nuttiness it added was incredible, though honestly, the original version has my heart.

Keeping The Magic Alive

Here's the deal with storage - these blondies stay perfectly chewy for a week in an airtight container. I use my grandmother's old cookie tin, with layers of wax paper between the bars. They never last that long though. For longer storage, wrap them individually and freeze them. My daughter calls them 'emergency happiness bars' and loves finding them in the freezer after a tough day at school.

Spreading The Love

These blondies have become my signature bring-along to every gathering. I package them in pretty boxes lined with parchment paper for teacher gifts. Last Valentine's Day, I made triple batches for my kids' classes - the other parents still talk about them. There's something about homemade treats that store-bought just can't match.

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Baker's Heart And Soul

  • Watch them like a hawk in the last few minutes of baking
  • Let them cool in the pan on a wire rack - air circulation matters
  • Cut them with a plastic knife for the cleanest edges

These blondies are more than just a recipe in my collection - they're part of our family's story. They've been there for celebrations, comfort after bad days, and countless moments in between. Every time I make them, I'm reminded that sometimes the simplest things, made with love, bring the most joy.

Frequently Asked Questions

→ Why can't I use natural peanut butter?
Natural peanut butter can be too oily and separate, affecting the texture. Stick to regular brands like Jif or Skippy for best results.
→ Can I use different types of M&Ms?
Yes! Try peanut, dark chocolate, or any seasonal M&Ms. Just keep the amount the same.
→ How do I know when they're done baking?
A toothpick in the center should come out clean or with a few moist crumbs, but no wet batter.
→ Can I freeze these blondies?
Yes, they freeze well for up to 4 months when wrapped tightly and stored in an airtight container.
→ Why do I need to let them cool for an hour?
Cooling helps the blondies set properly and makes them easier to cut into clean squares.

Valentine Peanut Butter Blondies

Chewy peanut butter blondies packed with M&Ms, made in one bowl. No mixer needed for these perfect Valentine's Day treats.

Prep Time
5 Minutes
Cook Time
26 Minutes
Total Time
31 Minutes

Category: Sweet Treats

Difficulty: Easy

Cuisine: American

Yield: 9 Servings

Dietary: Vegetarian

Ingredients

→ Wet Ingredients

01 ½ cup (1 stick) unsalted butter, melted
02 ½ cup peanut butter (Jif, Skippy or similar)
03 1 large egg
04 1 tablespoon vanilla extract

→ Dry Ingredients

05 1 cup light brown sugar, packed
06 1 cup all-purpose flour

→ Mix-ins

07 ¾ cup M&M's, divided (½ cup for batter, ¼ cup for topping)

Instructions

Step 01

Preheat oven to 350°F. Line an 8x8-inch baking pan with aluminum foil and spray with cooking spray

Step 02

In a large microwave-safe bowl, melt the butter. Let it cool slightly before continuing

Step 03

Add peanut butter, egg, brown sugar, and vanilla to the melted butter. Whisk until the mixture is smooth

Step 04

Stir in the flour just until combined, being careful not to overmix

Step 05

Gently fold in ½ cup of M&M's into the batter

Step 06

Pour batter into prepared pan and smooth the top. Sprinkle remaining ¼ cup M&M's on top and press lightly

Step 07

Bake for 22-26 minutes until a toothpick comes out clean or with just a few moist crumbs

Step 08

Let blondies cool in the pan for at least 1 hour before cutting

Notes

  1. Use regular peanut butter, not natural style which can be too oily
  2. Any variety of M&M's can be used - milk chocolate, peanut, or dark chocolate
  3. Blondies keep for up to 1 week in an airtight container at room temperature
  4. Can be frozen for up to 4 months

Tools You'll Need

  • 8x8-inch baking pan
  • Aluminum foil
  • Large microwave-safe bowl
  • Whisk
  • Spatula

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains peanuts
  • Contains dairy (butter, M&M's)
  • Contains eggs
  • Contains wheat (flour)

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 400
  • Total Fat: 22 g
  • Total Carbohydrate: 47 g
  • Protein: 6 g