"Yummies"! - Peanut Marshmallow Cookie Bars Recipe

Name: "Yummies"! - Peanut Marshmallow Cookie Bars
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1-1/2 cups (350 ml) all purpose flour; 2/3 cup (150 ml) firmly packed brown sugar; 1/2 tsp (2 ml) baking powder; 1/2 tsp (2 ml) salt; 1/4 tsp (1 ml) baking soda; 3/4 cup (175 ml) butter, softened (divided use); 1 tsp (5 ml) vanilla; 2 egg yolks; 3 cups (700 ml) miniature marshmallows; 2/3 cup (150 ml) corn syrup; 2 tsp (10 ml) vanilla; 1 12 oz (336 grm). to 16 oz (448 grm). package of Reece's peanut butter chips; 1 16 oz (448 grm). can salted, dry roasted peanuts

Servings: persons

1-1/2 cups (350 ml) all purpose flour
2/3 cup (150 ml) firmly packed brown sugar
1/2 tsp (2 ml) baking powder
1/2 tsp (2 ml) salt
1/4 tsp (1 ml) baking soda
3/4 cup (175 ml) butter, softened (divided use)
1 tsp (5 ml) vanilla
2 egg yolks
3 cups (700 ml) miniature marshmallows
2/3 cup (150 ml) corn syrup
2 tsp (10 ml) vanilla
1 12 oz (336 grm). to 16 oz (448 grm). package of Reece's peanut butter chips
1 16 oz (448 grm). can salted, dry roasted peanuts

1
Preheat your oven to 350 degrees (175 C.).
2
In a large mixing bowl, combine and gently blend until it is mixed the flour, brown sugar, baking powder, salt, baking soda, and 1/2 cup (125 ml) of the softened butter, 1 tsp (5 ml) vanilla, and egg yolks until crumbly.
3
Press this mixture firmly into the bottom of ungreased 9X13X2-inch baking pan, (basic cake pan).
4
Place them into the center of the oven and bake for only 12 to 15 minutes or until lightly browned.
5
Remove from oven and immediately sprinkle with marshmallows.
6
Return to the oven and bake for another 1 or 2 minutes, or until the marshmallows are just beginning to puff-up.
7
Take it from the oven and let it cool while you prepare the topping.
8
In a heavy bottomed large saucepan, combine the corn syrup, and the last 1/4 cup (60 ml) of the butter, the vanilla and the peanut butter chips.
9
Then, over low heat, melt everything until the Reece's peanut butter chips are just melted, not cooking, and the mixture is smooth, stirring constantly.
10
Immediately remove from the heat and stir in the peanuts.
11
Then, immediately spoon this warm topping evenly over the now cooled marshmallows.
12
(You may have to dip your fingers in cool water to prevent the mixture from sticking).
13
Cover the top as evenly as you can.
14
Place the pan in the refrigerator until completely chilled and firm, at least 2-3 hours.
15
To serve, cut them into desired sizes by dipping the knife into hot water occasionally to keep your slices clean and neat.

942

kcal

Calories

Fat

Carbs

Protein

Fat Carbs Protein

* Per serving · 4 servings · Values may vary.

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Preheat the oven fully and bake on the middle rack for the most even results.
Check for doneness a few minutes early — a toothpick in the center should come out with just a few moist crumbs.
Let it cool before slicing so it sets properly and holds its shape.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
Brown sugar instead of white sugar adds a deeper, more caramel-like flavor.
A good 1:1 gluten-free flour blend works well if you need a gluten-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

Saved locally in your browser — visible only to you.

How did you like this recipe?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

You need 13 ingredients. The key ingredients include: 1-1/2 cups (350 ml) all purpose flour, 2/3 cup (150 ml) firmly packed brown sugar, 1/2 tsp (2 ml) baking powder, 1/2 tsp (2 ml) salt, and more.

Yes, "Yummies"! - Peanut Marshmallow Cookie Bars falls under the Baking & Desserts category and is a great choice for this type of meal.

Store in an airtight container at room temperature for up to 3–5 days. For longer storage, freeze for up to 3 months — no need to refrigerate or reheat.

That's it — enjoy your meal!

"Yummies"! - Peanut Marshmallow Cookie Bars

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions