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Thin Mint Cookies

Published: Mar 25, 2025 by Patricia Collins

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Every year, as winter settles in, I find myself reminiscing about the days spent in the kitchen making Thin Mint Cookies with my family. The rich chocolate aroma mixed with the refreshing hint of peppermint fills the air, creating an instant sense of comfort. These cookies are not just a treat; they embody warmth and togetherness, making them the perfect indulgence for cozy evenings or holiday gatherings. Simple to prepare and irresistibly delicious, they are sure to become a cherished favorite in your home too.

Thin Mint Cookies - detail 1 this …

What Is Thin Mint Cookies?

Thin Mint Cookies are delightful chocolate cookies infused with a refreshing touch of peppermint, coated in smooth chocolate for that perfect finish. They are a beloved treat, especially during the holidays. With just a bit of prep and bake time, you can whip up a batch of 24 delicious cookies in less than 30 minutes!

  • Prep Time: 15 minutes
  • Cook Time: 10 minutes
  • Total Time: 25 minutes
  • Servings: 24 cookies

Why You'll Love Thin Mint Cookies

  • Quick preparation: With just 15 minutes of prep time, you can have these cookies ready to bake in no time.
  • Simple ingredients: Made with pantry staples, these cookies are easy to whip up whenever the craving strikes.
  • Beginner-friendly: The straightforward method makes it perfect for novice bakers to create something special.
  • Ideal for gatherings: These cookies are a hit at parties, holiday celebrations, or simply as a sweet treat to share with loved ones.
  • Make-ahead convenience: Bake a batch in advance and store them for a delightful surprise later!

Ingredients You'll Need

  • ½ cup butter, softened (for a richer flavor, use unsalted butter)
  • ½ cup granulated sugar
  • ½ cup brown sugar, packed (dark brown sugar adds extra moisture and depth)
  • 1 large egg
  • 1 cup all-purpose flour
  • ½ teaspoon baking powder
  • ½ teaspoon salt
  • ⅓ cup cocoa powder, unsweetened (for a deep chocolate flavor)
  • ½ teaspoon pure peppermint extract (adjust to taste for more minty flavor)
  • 8 ounces baking chocolate, chopped (use high-quality chocolate for best results)
  • ¼ teaspoon vegetable oil (to help the chocolate melt smoothly)
  • ¼ teaspoon pure peppermint extract (for an extra boost of mintiness)

Step-by-Step Instructions

Preparing the Ingredients

  1. Preheat your oven to 350°F (175°C) to ensure even baking.
  2. Gather all your ingredients and measure them out for easy access during preparation.

Mixing the Dough

  1. In a mixing bowl, cream together the ½ cup softened butter, granulated sugar, and brown sugar until the mixture is smooth and fluffy.
  2. Add in 1 large egg and beat thoroughly until well combined.
  3. In another bowl, whisk together 1 cup all-purpose flour, ½ teaspoon baking powder, ½ teaspoon salt, ⅓ cup cocoa powder, and ½ teaspoon pure peppermint extract.
  4. Gradually mix the dry ingredients into the butter mixture until fully incorporated.

Shaping the Cookies

  1. Using a tablespoon, drop rounded portions of dough onto a baking sheet lined with parchment paper.
  2. Flatten each dough ball slightly with your fingers to create an even shape.

Baking the Cookies

  1. Bake the cookies in your preheated oven for 10 minutes, watching for them to turn golden brown on the edges.
  2. Remove from the oven and let them cool on the baking sheet for a few minutes before transferring to a wire rack.

Cooling and Coating

  1. While the cookies cool, prepare the chocolate coating by melting 8 ounces of baking chocolate with ¼ teaspoon vegetable oil and ¼ teaspoon pure peppermint extract in a microwave-safe bowl.
  2. Dip each cooled cookie into the melted chocolate, ensuring it's fully coated.
  3. Place the coated cookies back on the parchment paper and let them set until the chocolate hardens.
Thin Mint Cookies - detail 2

Variations

  • Add crushed candy canes for an extra minty crunch during the holidays.
  • Substitute dark chocolate for the coating for a richer flavor.
  • Try adding a pinch of sea salt on top of the chocolate for a sweet and salty contrast.
  • Make gluten-free cookies by using almond flour or a gluten-free flour blend.
  • For a fun twist, incorporate a light drizzle of white chocolate over the chocolate coating.

Serving and Storage Tips

Serving

Serve these Thin Mint Cookies on a festive platter, perhaps alongside a warm cup of cocoa or peppermint tea. They make a delightful addition to holiday gatherings or cozy movie nights with family and friends.

Storage

Store cookies in an airtight container at room temperature for up to a week. For longer storage, freeze them in a zip-top bag for up to three months. Just thaw at room temperature before enjoying!

Common Mistakes

  • Not measuring ingredients accurately can lead to inconsistent texture; always use proper measuring cups and spoons.
  • Baking the cookies for too long can cause them to become dry; check for a soft center when removing from the oven.
  • Skipping the cooling step before coating can result in melted chocolate; ensure cookies are fully cooled for a smooth finish.
  • Using low-quality chocolate can affect the flavor; opt for high-quality baking chocolate for the best results.

Helpful Notes

  • For a dairy-free option, use vegan butter and dairy-free chocolate.
  • Feel free to adjust the cocoa powder to your taste; you can use Dutch-processed cocoa for a smoother flavor.
  • Add chopped nuts like walnuts or pecans for added texture and taste.
  • For a more intense mint flavor, increase the peppermint extract to 1 teaspoon.

Frequently Asked Questions

Can the recipe be frozen?

Yes, you can freeze Thin Mint Cookies! Place them in a single layer on a baking sheet until frozen, then transfer them to a zip-top bag. They can be frozen for up to three months. Just thaw at room temperature before enjoying.

Can ingredients be substituted?

Absolutely! You can substitute unsalted butter with coconut oil for a dairy-free version. If you don’t have cocoa powder, carob powder can be a great alternative. Also, feel free to use gluten-free flour to make the recipe gluten-free.

How to store leftovers?

Store any leftover cookies in an airtight container at room temperature for up to a week. Make sure they are completely cooled to maintain freshness and prevent sogginess.

Can the recipe be made ahead?

Definitely! You can prepare the cookie dough in advance and refrigerate it for up to 48 hours before baking. This way, you can enjoy freshly baked cookies whenever the craving strikes!

Final Thoughts

I hope you find as much joy in making Thin Mint Cookies as I do. They are a delightful treat that brings warmth and sweetness to any occasion, perfect for sharing with family and friends. Whether you're baking for a special gathering or just a cozy evening at home, these cookies are sure to bring smiles all around. So gather your loved ones, whip up a batch, and enjoy the delicious memories that come with each bite!

Thin Mint Cookies

Thin Mint Cookies

These Thin Mint Cookies feature a rich chocolate flavor with a refreshing hint of peppermint.
Print Recipe Pin Recipe
Prep Time 15 minutes mins
Cook Time 10 minutes mins
Total Time 25 minutes mins
Course Dessert
Cuisine American
Servings 24 cookies
Calories 150 kcal

Equipment

  • Mixing bowl
  • Baking sheet

Ingredients
  

For the Cookie Dough

  • ½ cup butter
  • ½ cup granulated sugar
  • ½ cup brown sugar
  • 1 each egg
  • 1 cup flour
  • ½ teaspoon baking powder
  • ½ teaspoon salt
  • ⅓ cup cocoa powder
  • ½ teaspoon pure peppermint extract

For the Chocolate Coating

  • 8 ounces baking chocolate
  • ¼ teaspoon vegetable oil
  • ¼ teaspoon pure peppermint extract

Instructions
 

  • Preheat your oven to 350°F (175°C).
  • In a mixing bowl, cream together the butter, granulated sugar, and brown sugar until smooth. Beat in the egg.
  • In another bowl, whisk together the flour, baking powder, salt, cocoa powder, and peppermint extract. Gradually mix this into the butter mixture.
  • Drop rounded tablespoons of dough onto a baking sheet and flatten slightly.
  • Bake for 10 minutes, then let cool.
  • For the chocolate coating, melt the baking chocolate with vegetable oil and peppermint extract. Dip each cookie in the chocolate and let them set on parchment paper.

Notes

Store cookies in an airtight container for freshness. You can also adjust the peppermint extract to your taste.
Keyword chocolate cookies, peppermint cookies, Thin Mint Cookies

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Hi, I’m Patricia—a home cook sharing simple, comforting recipes to bring people together and make everyday meals memorable.

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