Cinnamon Sugar Monster Cookie Loaf

Featured in: Sweet Comfort Bakes

This cinnamon sugar monster loaf combines chewy oats with semisweet chocolate chips and colorful chocolate candies, all swirled through a soft, buttery batter. Each slice unveils a decadent texture layered with cinnamon sugar and sweet, nutty notes from creamy peanut butter. Finished with a crunchy cinnamon topping, this bakery-inspired treat is ideal for slicing and sharing. Enjoy warm with ice cream, or store for on-the-go indulgence. Versatile, easy to make, and crowd-pleasing—it's a fun dessert for every sweet occasion.

Updated on Fri, 31 Oct 2025 08:44:00 GMT
A beautifully baked Cinnamon Sugar Monster Cookie Loaf topped with colorful candy pieces.  Pin It
A beautifully baked Cinnamon Sugar Monster Cookie Loaf topped with colorful candy pieces. | sweetbatata.com

A decadent, bakery-style loaf combining chewy oats, chocolate chips, colorful candies, and cinnamon sugar for a cookie-inspired treat perfect for sharing.

The first time I baked this loaf, my kitchen smelled like a bakery and every bite was packed with just the right amount of crunch and sweetness.

Ingredients

  • All-purpose flour: 2 cups (250 g)
  • Old-fashioned rolled oats: 1 cup (100 g)
  • Baking powder: 1 teaspoon
  • Baking soda: 1/2 teaspoon
  • Salt: 1/2 teaspoon
  • Ground cinnamon: 1 teaspoon
  • Unsalted butter, softened: 1/2 cup (115 g)
  • Vegetable oil: 1/2 cup (120 ml)
  • Light brown sugar, packed: 1 cup (200 g)
  • Granulated sugar: 1/2 cup (100 g) plus 2 tablespoons for topping
  • Large eggs, room temperature: 2
  • Pure vanilla extract: 2 teaspoons
  • Creamy peanut butter: 1/2 cup (125 g)
  • Semisweet chocolate chips: 3/4 cup (130 g)
  • Candy-coated chocolate pieces (e.g., M&Ms): 3/4 cup (130 g)
  • Ground cinnamon (for topping): 1 teaspoon

Instructions

Prepare Pan:
Preheat oven to 350°F (175°C). Grease and line a 9x5-inch (23x13 cm) loaf pan with parchment paper, leaving an overhang.
Combine Dry Ingredients:
In a medium bowl, whisk together flour, oats, baking powder, baking soda, salt, and cinnamon.
Cream Wet Ingredients:
In a large bowl, cream butter, oil, brown sugar, and granulated sugar until light and fluffy, about 2 to 3 minutes.
Add Eggs and Wet Mix:
Beat in eggs one at a time, then add vanilla and peanut butter. Mix until smooth.
Mix Batter:
Stir dry ingredients into the wet mixture until just combined.
Fold in Mix-ins:
Gently fold in chocolate chips and candy-coated chocolate pieces.
Add to Pan and Top:
Spread batter evenly into loaf pan. Mix 2 tablespoons granulated sugar with 1 teaspoon cinnamon for topping and sprinkle over batter.
Bake:
Bake 50 to 55 minutes or until a toothpick inserted in the center comes out with moist crumbs.
Cool and Serve:
Let cool 15 minutes in pan, then transfer to a wire rack to cool completely before slicing.
Golden-brown slices of Cinnamon Sugar Monster Cookie Loaf drizzled with warm vanilla icing.  Pin It
Golden-brown slices of Cinnamon Sugar Monster Cookie Loaf drizzled with warm vanilla icing. | sweetbatata.com

We sliced the loaf together after dinner and it quickly became everyone’s favorite pick at family gatherings.

Required Tools

9x5-inch loaf pan, mixing bowls, electric mixer or whisk, measuring cups and spoons, parchment paper, wire rack

Allergen Information

Contains wheat, eggs, milk (in chocolate chips/candies), peanuts (peanut butter), and possibly soy. For nut-free, use nut-free butter and candies. Always check labels for cross-contamination.

Nutritional Information (per serving)

Calories: 375, Total Fat: 17 g, Carbohydrates: 50 g, Protein: 6 g

Indulgent Cinnamon Sugar Monster Cookie Loaf, featuring rich chocolate chips and chewy oats. Pin It
Indulgent Cinnamon Sugar Monster Cookie Loaf, featuring rich chocolate chips and chewy oats. | sweetbatata.com

Enjoy every bite of this festive loaf fresh or saved for an after-dinner treat. Your friends will ask for the recipe!

Recipe Questions & Answers

What makes this loaf chewy?

Old-fashioned rolled oats and creamy peanut butter create a soft yet chewy texture in every slice.

Can I make this nut-free?

Yes, substitute peanut butter with sunflower or almond butter and select nut-free candies for a safe alternative.

How should leftovers be stored?

Keep slices in an airtight container at room temperature for up to 4 days to preserve softness.

What loaf pan size is best?

Use a standard 9x5-inch loaf pan for the perfect bake and shape.

Can I add other mix-ins?

Roasted peanuts, white chocolate chips, or additional candies can be folded in for extra crunch and flavor.

Cinnamon Sugar Monster Cookie Loaf

Decadent loaf swirled with cinnamon sugar, chocolate chips, and candies for a chewy, shareable treat.

Prep Time
20 min
Cook Time
55 min
Overall Time
75 min
Created by Nora James


Skill Level Easy

Cuisine American

Makes 10 Portions

Dietary Details Meat-Free

What You'll Need

Dry Ingredients

01 2 cups all-purpose flour
02 1 cup old-fashioned rolled oats
03 1 teaspoon baking powder
04 1/2 teaspoon baking soda
05 1/2 teaspoon salt
06 1 teaspoon ground cinnamon

Wet Ingredients

01 1/2 cup unsalted butter, softened
02 1/2 cup vegetable oil
03 1 cup light brown sugar, packed
04 1/2 cup granulated sugar
05 2 large eggs, room temperature
06 2 teaspoons pure vanilla extract
07 1/2 cup creamy peanut butter

Mix-ins

01 3/4 cup semisweet chocolate chips
02 3/4 cup candy-coated chocolate pieces

Cinnamon Sugar Topping

01 2 tablespoons granulated sugar
02 1 teaspoon ground cinnamon

Cooking Steps

Step 01

Prepare Loaf Pan and Oven: Preheat oven to 350°F. Grease and line a 9x5-inch loaf pan with parchment paper, ensuring an overhang for effortless removal.

Step 02

Combine Dry Ingredients: Whisk together flour, oats, baking powder, baking soda, salt, and ground cinnamon in a medium mixing bowl. Set aside.

Step 03

Cream Butter and Sugars: In a large bowl, use an electric mixer or whisk to cream butter, vegetable oil, brown sugar, and granulated sugar until pale and fluffy, approximately 2–3 minutes.

Step 04

Incorporate Eggs, Vanilla, and Peanut Butter: Add eggs one at a time into the creamed mixture, mixing thoroughly after each addition. Blend in vanilla extract and creamy peanut butter until smooth.

Step 05

Combine Wet and Dry Mixtures: Gently stir the dry ingredients into the wet mixture, mixing just until incorporated. Avoid overmixing to maintain loaf tenderness.

Step 06

Fold in Mix-Ins: Carefully fold semisweet chocolate chips and candy-coated chocolate pieces into the batter.

Step 07

Fill Pan and Add Cinnamon Sugar: Transfer batter into the prepared loaf pan, smoothing the top. Mix granulated sugar with ground cinnamon for the topping and sprinkle evenly over batter surface.

Step 08

Bake: Bake for 50–55 minutes, or until a toothpick inserted into the center yields a few moist crumbs.

Step 09

Cool and Slice: Let the loaf cool in the pan for 15 minutes. Remove using the parchment overhang and cool completely on a wire rack before slicing.

Equipment Needed

  • 9x5-inch loaf pan
  • Mixing bowls
  • Electric mixer or whisk
  • Measuring cups and spoons
  • Parchment paper
  • Wire rack

Allergy Notice

Check each ingredient for allergens and reach out to a healthcare professional if you have concerns.
  • Contains wheat (gluten), eggs, milk (in chocolate chips/candies), peanuts, soy (possible in candies/chocolate chips).
  • For nut-free, select nut-free butter substitutes and candies. Always check ingredient labels for cross-contamination risks.

Nutrition Information (per portion)

Sweetbatata only offers this for informational use. Please don't treat it as personalized medical advice.
  • Caloric Value: 375
  • Fats: 17 g
  • Carbohydrates: 50 g
  • Proteins: 6 g