If you love classic no-bake treats with a fudgy twist, Dandy Do Cookies will quickly become your new go-to favorite. These old-fashioned, chewy cookies are packed with oats, chocolate, and gooey marshmallows—easy to make, dangerously delicious, and perfect for when you want a quick dessert without heating up the oven.
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Why You’ll Love This Recipe
No Baking Required – Perfect for quick treats and warm weather
Fudgy and Chewy – Like a cross between a cookie and candy
Kid-Friendly – Fun to make and eat
Minimal Ingredients – Mostly pantry staples
Perfect for Sharing – Great for parties, potlucks, and holidays
Ingredients You’ll Need
2 cups granulated sugar
½ cup whole milk
½ cup unsalted butter
¼ cup unsweetened cocoa powder
½ tsp salt
1 tsp vanilla extract
3 cups quick oats
1½ cups mini marshmallows
½ cup peanut butter (optional for creaminess and flavor)
Tools You’ll Need
Medium saucepan
Wooden spoon or spatula
Measuring cups and spoons
Wax paper or parchment paper
Cookie scoop or spoon
Step-by-Step Instructions
Step 1: Prepare Your Surface
Line a countertop or baking sheet with wax paper or parchment paper to drop the cookies onto.
Step 2: Make the Chocolate Base
In a medium saucepan, combine sugar, milk, butter, cocoa powder, and salt.
Bring to a gentle boil over medium heat, stirring constantly.
Once boiling, cook for 1 full minute, then remove from heat.
Step 3: Add Flavor and Texture
Stir in vanilla extract and peanut butter (if using) until smooth.
Add oats and mix until fully coated.
Fold in mini marshmallows last. Stir gently—some will melt slightly for a gooey texture.
Step 4: Drop the Cookies
Using a spoon or cookie scoop, drop spoonfuls onto prepared wax paper.
Let them cool and set at room temperature for 30–45 minutes until firm.
Step 5: Serve and Enjoy
Once set, enjoy immediately or store for later.
Tips for the Best Dandy Do Cookies
Use Quick Oats – They absorb better and give the perfect chewy texture
Don’t Overboil – Just 1 minute ensures they stay soft and fudgy
Mix Marshmallows Last – This keeps some whole and gooey
Customize – Add chopped nuts, shredded coconut, or mini chocolate chips
Serving Suggestions
Serve with:
A glass of cold milk
Hot cocoa or coffee
A scoop of vanilla ice cream for a decadent twist
Perfect for:
Lunchbox treats
No-bake dessert trays
Holiday cookie swaps
Weeknight indulgences
How to Store & Freeze
Refrigerate: Store in an airtight container for up to 5 days
Freeze: Freeze between layers of wax paper in a sealed container for up to 2 months
Thaw: Let sit at room temperature for 15–20 minutes before serving
Frequently Asked Questions
Can I use old-fashioned oats?
Yes, but the texture will be heartier and slightly chewier.
Can I skip the marshmallows?
You can, but they add that signature gooey bite that makes these cookies special.
Can I make them dairy-free?
Use dairy-free butter and plant-based milk.
What if my cookies don’t set?
Make sure the mixture boiled for a full minute. If not, they may stay too soft.
Final Thoughts
Dandy Do Cookies are a nostalgic no-bake treat that’s as easy as it is delicious. With their rich, chocolatey flavor and gooey marshmallow goodness, they’re a hit with kids and adults alike. Make a batch today and watch them disappear fast!
Try it out and let me know what you think! Don’t forget to leave a review below and share your photos on Pinterest! I can’t wait to see how your Dandy Do Cookies turn out.
Preparation Time: 10 minutes
Setting Time: 30 minutes
Cuisine: American
Nutritional Information (Per Cookie):
Calories: 210 | Protein: 2g | Carbohydrates: 27g | Fat: 10g | Fiber: 1g | Sodium: 85mg

Dandy Do Cookies
- Total Time: 40 minutes
Description
If you love classic no-bake treats with a fudgy twist, Dandy Do Cookies will quickly become your new go-to favorite. These old-fashioned, chewy cookies are packed with oats, chocolate, and gooey marshmallows—easy to make, dangerously delicious, and perfect for when you want a quick dessert without heating up the oven.
Want recipes like this delivered straight to your inbox? Subscribe now to get the latest culinary creations you’ll love.
Ingredients
2 cups granulated sugar
½ cup whole milk
½ cup unsalted butter
¼ cup unsweetened cocoa powder
½ tsp salt
1 tsp vanilla extract
3 cups quick oats
1½ cups mini marshmallows
½ cup peanut butter (optional for creaminess and flavor)
Instructions
Step 1: Prepare Your Surface
Line a countertop or baking sheet with wax paper or parchment paper to drop the cookies onto.
Step 2: Make the Chocolate Base
In a medium saucepan, combine sugar, milk, butter, cocoa powder, and salt.
Bring to a gentle boil over medium heat, stirring constantly.
Once boiling, cook for 1 full minute, then remove from heat.
Step 3: Add Flavor and Texture
Stir in vanilla extract and peanut butter (if using) until smooth.
Add oats and mix until fully coated.
Fold in mini marshmallows last. Stir gently—some will melt slightly for a gooey texture.
Step 4: Drop the Cookies
Using a spoon or cookie scoop, drop spoonfuls onto prepared wax paper.
Let them cool and set at room temperature for 30–45 minutes until firm.
Step 5: Serve and Enjoy
Once set, enjoy immediately or store for later.
Notes
Use Quick Oats – They absorb better and give the perfect chewy texture
Don’t Overboil – Just 1 minute ensures they stay soft and fudgy
Mix Marshmallows Last – This keeps some whole and gooey
Customize – Add chopped nuts, shredded coconut, or mini chocolate chips
- Prep Time: 10 minutes
- Cook Time: 30 minutes
- Cuisine: American