Cinnamon Sugar Monster Cookie

Featured in: Homestyle Baking

This bakery-style loaf combines chewy oats, chocolate chips, candies, and a cinnamon sugar topping for a flavorful treat. Soft and satisfying, it’s ideal for sharing and best enjoyed freshly baked or gently warmed. Simple preparation methods—mixing wet and dry ingredients, adding classic cookie mix-ins, and sprinkling with cinnamon sugar—make this dessert approachable for cooks of all skill levels. The result is a moist, colorful loaf with contrasting crunchy toppings and pockets of melty chocolate. Serve in thick slices for dessert or snack. Store leftovers airtight for up to four days; delicious with vanilla ice cream, or try nut-free swaps as needed.

Updated on Thu, 30 Oct 2025 14:29:00 GMT
A warm slice of Cinnamon Sugar Monster Cookie Loaf topped with colorful candies.  Save
A warm slice of Cinnamon Sugar Monster Cookie Loaf topped with colorful candies. | forkina.com

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

I baked this loaf for my friends on game night, and its playful mixture of candies and cinnamon instantly made everyone smile. It’s a guaranteed hit for birthdays, potlucks, or casual get-togethers.

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)
  • 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: 3/4 cup (130 g) (e.g., M&Ms)
  • Granulated sugar (for topping): 2 tablespoons
  • Ground cinnamon (for topping): 1 teaspoon

Instructions

Prepare Pan:
Preheat your oven to 350°F (175°C). Grease and line a 9x5-inch (23x13 cm) loaf pan with parchment paper, leaving an overhang for easy removal.
Mix Dry Ingredients:
In a medium bowl, whisk together flour, oats, baking powder, baking soda, salt, and cinnamon. Set aside.
Cream Wet Ingredients:
In a large bowl, cream the butter, oil, brown sugar, and granulated sugar until light and fluffy, about 2(3 minutes.
Add Eggs, Vanilla, Peanut Butter:
Beat in the eggs, one at a time, then add vanilla extract and peanut butter. Mix until smooth.
Combine:
Add the dry ingredients to the wet mixture and stir until just combined (do not overmix).
Fold Mix-Ins:
Fold in the chocolate chips and candy-coated chocolate pieces.
Assemble:
Spread the batter evenly into the prepared loaf pan.
Top:
In a small bowl, mix together the cinnamon and sugar for the topping. Sprinkle evenly over the batter.
Bake:
Bake for 50(55 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
Cool:
Cool in the pan for 15 minutes, then transfer to a wire rack to cool completely before slicing.
Golden-brown Cinnamon Sugar Monster Cookie Loaf drizzled with melting chocolate chips.  Pin it
Golden-brown Cinnamon Sugar Monster Cookie Loaf drizzled with melting chocolate chips. | forkina.com

My little sister loves helping swirl the cinnamon sugar on top, and we always laugh trying to guess which slice hides the most candies. It’s turned weekend baking into a sweet family tradition.

Notes

For extra crunch, add 1/2 cup chopped roasted peanuts. Swap peanut butter for sunflower seed or almond butter if needed. Serve warm with vanilla ice cream for a decadent dessert.

Required Tools

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

Nutritional Information

Each serving (slice) has about 375 calories, 17 g fat, 50 g carbohydrates, and 6 g protein.

Delicious Cinnamon Sugar Monster Cookie Loaf, perfect for dessert and sharing moments. Pin it
Delicious Cinnamon Sugar Monster Cookie Loaf, perfect for dessert and sharing moments. | forkina.com

Slice thick pieces and enjoy with milk or coffee. This loaf disappears fast at gatherings!

Frequently Asked Questions

How do I know when the loaf is done baking?

Insert a toothpick into the center; it should come out with a few moist crumbs but not wet batter.

Can I substitute peanut butter with another ingredient?

Yes. Almond or sunflower seed butter work well; opt for nut-free candies if needed.

What is the best way to store leftovers?

Place in an airtight container at room temperature for up to four days, keeping slices soft and fresh.

Is it possible to make this loaf gluten-free?

Try using gluten-free flour and certified gluten-free oats. Check all candy and chocolate chip labels.

Does this dessert work for vegetarians?

Yes, all main ingredients are suitable for a vegetarian diet. Check candies for gelatin or additives.

Can I freeze the loaf for later?

Slice and wrap pieces individually. Freeze for up to two months. Thaw at room temperature before serving.

What kind of candies are used in the loaf?

Use candy-coated chocolate pieces like M&Ms; you can swap for other favorite candy varieties.

Cinnamon Sugar Monster Cookie

Oat, chocolate, and cinnamon sugar loaf with candies. Easy to bake and ideal for sharing any time.

Prep Time
20 Minutes
Cook Time
55 Minutes
Total Time
75 Minutes

Category: Homestyle Baking

Difficulty: Easy

Cuisine: American

Yield: 10 servings

Dietary: Vegetarian

Ingredients

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

Instructions

Step 01

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

Step 02

Combine Dry Ingredients: In a medium mixing bowl, whisk together flour, rolled oats, baking powder, baking soda, salt, and cinnamon. Set aside.

Step 03

Cream Wet Ingredients: In a large bowl, using an electric mixer or whisk, cream softened butter, vegetable oil, brown sugar, and granulated sugar until light and fluffy, about 2–3 minutes.

Step 04

Incorporate Eggs and Flavors: Beat in the eggs, one at a time, then mix in vanilla extract and peanut butter, blending until smooth.

Step 05

Combine Wet and Dry Components: Add the dry ingredients to the wet mixture. Stir gently until just combined, avoiding overmixing.

Step 06

Add Mix-Ins: Fold in the chocolate chips and candy-coated chocolate pieces evenly throughout the batter.

Step 07

Transfer Batter: Spread the batter evenly into the prepared loaf pan, smoothing the top.

Step 08

Prepare Cinnamon Sugar Topping: In a small bowl, mix granulated sugar and ground cinnamon. Sprinkle evenly over the surface of the batter.

Step 09

Bake: Bake for 50–55 minutes, or until a toothpick inserted in the center emerges with a few moist crumbs.

Step 10

Cool and Serve: Let the loaf cool in the pan for 15 minutes, then transfer to a wire rack. Allow to cool completely before slicing.

Tools You'll Need

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

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains wheat (gluten), eggs, milk (present in chocolate chips or candies), peanuts (peanut butter), and soy (in candies or chocolate chips). For nut-free options, use alternatives and check labels for cross-contamination.

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 375
  • Total Fat: 17 g
  • Total Carbohydrate: 50 g
  • Protein: 6 g