M and M Cookie Bars

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Festive M&M Cookie Bars: A Sweet Solution for Leftover Egg Yolks

Is there anything more festive than a tray of freshly baked M&M cookie bars? Today, I’m sharing a truly special recipe that’s not only irresistibly delicious and moist but also a brilliant way to use up six leftover egg yolks from all that holiday baking. Whether you’re planning a cozy afternoon treat or whipping up something cheerful for a Christmas party, these cookie bars are here to save the day!

Are you curious about how to make the most of those extra M&Ms—or wondering what to do with your leftover egg whites?

These versatile cookie bars can be tailored to your holiday mood! Use red and green M&Ms for a classic Christmas vibe, or let your inner artist shine with a rainbow of colors. And if you’ve got more M&Ms than you know what to do with, why not bake a batch of M&M cookies too? Trust me, they’re just as easy and delicious as these bars.

Oh, and those extra egg whites? Waste not, want not! Turn them into a luscious 6-egg white chocolate cake or a batch of Grandma’s famous coconut macaroons. Both are perfect additions to your holiday dessert table and a great way to keep the season merry and bright—while reducing food waste at the same time.

So, let’s dive in and bake up some holiday magic! And if you’re on the hunt for even more creative ways to use up egg yolks or whites, keep reading—I’ve got you covered with plenty of ideas below.

🥘 Ingredients

• Egg yolks
• Unsalted butter, melted and slightly cooled
• Brown sugar – I opted for Demerara Sugar
• Granulated sugar
• Vanilla extract
• All-purpose flour
• Baking powder
• Salt
• M&M’s – Red and green or rainbow colored

See the recipe card for quantities.

🔪 Instructions

Preheat Oven

Preheat your oven to 350°F (175°C). Line a 9×13-inch (23×33 cm) baking pan with parchment paper, leaving an overhang for easy removal.

Mix Wet Ingredients

In a large mixing bowl, whisk together the melted butter, brown sugar, and granulated sugar until smooth. Add the egg yolks and vanilla extract, whisking until fully combined.

Combine Dry Ingredients

In a separate bowl, whisk together the flour, baking powder, and salt.

Form the Dough

Gradually add the dry ingredients to the wet mixture, stirring just until combined. Gently fold in the M&M’s.

Spread in Pan

Pour the batter into the prepared baking pan and spread it evenly with a spatula. Scatter a few extra M&M’s on top for decoration.

Bake

Bake for 30-45 minutes, or until the edges are golden and a toothpick inserted in the center comes out with a few moist crumbs. Do not overbake to keep the bars chewy.

Cool and Slice

Let the bars cool completely in the pan, then lift them out using the parchment overhang. Slice into squares or rectangles.

🍽 Equipment

• 9×13-inch (23×33 cm) pan
• Parchment paper
• Hand or Stand mixer
• Mixing bowls
• Spatula
• Sharp knife

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6 Egg Yolk M&M Cookie Bars

These M&M cookie bars are moist, chewy, and the perfect solution for using up leftover egg yolks! With a touch of creativity, you can customize them for the holidays or any occasion. A simple, delicious way to reduce food waste while baking up some joy.

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5 from 5 votes

Prep Time:15 minutes mins

Baking Time:30 minutes mins

Total Time:45 minutes mins

Equipment

• 9×13-inch (23×33 cm) pan
• Parchment Paper
• Hand or stand mixer
• Mixing bowls
• Spatula
• Sharp knife

Ingredients

• 1 cup Unsalted butter, melted and slightly cooled
• 1 cup Brown sugar
• ½ cup Granulated sugar
• 6 egg yolks
• 1 tsp Vanilla extract
• 2 cups All-purpose flour
• 1 tsp Baking powder
• ½ tsp Salt
• 1 cup M&M’s (plus a few extra for topping)

Metric – US Customary

Instructions

• Preheat your oven to 350°F (175°C). Line a 9×13-inch (23×33 cm) baking pan with parchment paper, leaving an overhang for easy removal.
• In a large mixing bowl, whisk together 1 cup Unsalted butter, melted and slightly cooled, 1 cup Brown sugar, and ½ cup Granulated sugar until smooth.
  1 cup Unsalted butter, melted and slightly cooled, 1 cup Brown sugar, ½ cup Granulated sugar
• Add 6 egg yolks and 1 tsp Vanilla extract, whisking until fully combined.
  6 egg yolks, 1 tsp Vanilla extract
• In a separate bowl, whisk together 2 cups All-purpose flour, 1 tsp Baking powder, and ½ tsp Salt.
  2 cups All-purpose flour, 1 tsp Baking powder, ½ tsp Salt
• Gradually add the dry ingredients to the wet mixture, stirring just until combined. Gently fold in the 1 cup M&M’s .
  1 cup M&M’s
• Pour the batter into the prepared baking pan and spread it evenly with a spatula. Scatter a few extra M&M’s on top for decoration.
• Bake for 30-45 minutes, or until the edges are golden and a toothpick inserted in the center comes out with a few moist crumbs. Do not overbake to keep the bars chewy.
• Let the bars cool completely in the pan, then lift them out using the parchment overhang. Slice into squares or rectangles.

Nutrition

Serving: 31Bar | Calories: 256kcal | Carbohydrates: 32g | Protein: 3g | Fat: 13g | Saturated Fat: 8g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.4g | Cholesterol: 84mg | Sodium: 91mg | Potassium: 25mg | Fiber: 1g | Sugar: 22g | Vitamin A: 385IU | Vitamin C: 0.1mg | Calcium: 37mg | Iron: 1mg

Servings: 20 Bars

Calories: 256kcal

Author: Nora

⛑️ Food Safety

• Cook to a minimum temperature of 165 °F (74 °C)
• Do not use the same utensils on cooked food, that previously touched raw meat
• Wash hands after touching raw meat
• Don’t leave food sitting out at room temperature for extended periods
• Never leave cooking food unattended
• Use oils with high smoking point to avoid harmful compounds
• Always have good ventilation when using a gas stove

For further information, check Safe Food Handling – FDA.

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