Kitchen Sink Blondies

Everything but the Kitchen Sink Blondies. Lots of goodies from sweet chocolate and butterscotch chips, to salty pretzels, rice krispies, and gooey marshmallows. These will go fast!
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Have you ever tried “everything but the kitchen sink cookies“? The concept is a fully loaded cookie with everything and anything you can think of, minus the kitchen sink. Now obviously this does not imply “everything” literally, but you get the point.
They are basically a cookie filled with sweet and salty flavors. Usually a variety of baking chips, dried fruit and marshmallows. And something salty like pretzels, nuts, or potato chips. They are super versatile so it’s a great cookie to make when you need to use up cookie friendly items in the pantry. Kitchen sink cookies also have a chewy, soft, and crisp texture. They’re pretty much the perfect all-rounded treat that includes everything but the kitchen sink!
Now I love baking cookies and you’ll find plenty here on my website. I also like the ease of baking a single pan of brownies, so that’s why I created the Kitchen Sink Blondies. These are easy and incredibly good. Dare I say, our family actually loves these even better than the cookie. It’s like a cookie/brownie, really, so it’s the best of both worlds. They’re chewy, soft, crisp, and kinda fudgy. Each bite is the perfect balance of sweet and salty, and they’re just over-the-top yummy. You’ll just have to see for yourself!

Ingredients For Kitchen Sink Blondies:
- All-purpose flour
- Salt
- Baking soda
- Melted butter
- Brown sugar
- Eggs
- Vanilla extract
- Baking chips- dark chocolate, semi-sweet, & butterscotch
- Broken pretzels pieces
- Rice krispies cereal
- Mini marshmallows
Just like the kitchen sink cookie these blondies are versatile so use what you have on hand. Here are some suggestions.
Additional add-ins
- Cereal– Lightly crushed corn flakes or corn chex. Cocoa krispies, or honey bunches of oats.
- Nuts– Use finely chopped pecans, almonds or walnuts.
- Potato chips– Gently crumble plain potato chips over the top of the blondie just before baking.
- Baking chips– Use a combination of white chocolate, semi-sweet, and peanut butter chips.
- Coconut- Use sweetened or unsweetened shredded coconut.

How To Make Kitchen Sink Blondies:
Step 1. Preheat oven to 350℉ and spray a 9×13-inch baking dish with non-stick cooking spray.
Step 2. In a small bowl mix flour, salt and baking soda. Set aside until ready to use.
Step 3. In a large bowl or stand mixer, cream together butter and brown sugar. Add eggs and vanilla extract and beat well. Add the flour mixture in thirds, mixing well each time until incorporated.
Step 4. Fold in baking chips, then crushed pretzels, then finally rice krispies. The batter will be thick.
Step 5. Transfer brownie batter to prepared baking dish. Use the back of a spoon or clean hands to press down and spread out evenly. Top with mini marshmallows and slightly press each one into the batter.
Step 6. Bake in preheated oven for 20-25 minutes. The top should be golden brown and the edges crisp.
The hardest part about these blondies is they do need to cool for at least 15-minutes. Otherwise they won’t cut into squares very easily and they’ll fall apart. Although, I have been known to go in with a spoon when they come out of the oven because I couldn’t wait that long. 😉

Pro tips:
- Don’t overmix the batter- Overmixing the batter can cause the blondies to be dense and not rise properly. Plus, you don’t want to crush the cereal too much.
- Grease hands before pressing into the pan- The batter is thick and sticky so having slick fingers will help spread the mixture evenly.
- Add a few mix-ins to the top of the blondie batter– In addition to the marshmallows, I like to add a few more broken pieces of pretzels. It looks fun and adds more crunch. This is also a good time to add potato chips.
Kitchen Sink Blondies are a fun and delicious treat to share, and depending on what add-ins you decide to use, you’re sure to have everyone guessing the mystery ingredients.

Other Treats You Might Like:
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I appreciate your comments and reviews! Be sure to leave a comment or rating below for suggestions, questions, or if you make the recipe. I’d love to know how it turned out for you!
Let’s eat!🤍

Kitchen Sink Blondies
Equipment
- 1 large mixing bowl
- 1 small mixing bowl
- 1 9×13-inch baking dish
Ingredients
- 2 cups all-purpose flour
- 1 tsp kosher salt
- 1 tsp baking soda
- 12 tbsp melted butter, slightly cooled
- 1 cup firmly packed light brown sugar
- 2 large eggs
- 2 tsp pure vanilla extract
- 1/2 cup dark chocolate chips
- 1/2 cup semi-sweet chocolate chips
- 1/2 cup butterscotch chips
- 1/2 cup broken pretzels
- 1/2 cup rice krispies cereal
- 1 cup mini marshmallows
Instructions
Preheat oven to 350°F and grease a 9×13-inch baking dish with butter or non-stick cooking spray
- In a small bowl mix flour, salt and baking soda. Set aside.
- In a large bowl or stand mixer, cream together butter and brown sugar. Add eggs and vanilla extract and beat well. Add the flour mixture in thirds, mixing well each time.
- Using a large spoon, fold in baking chips, then crushed pretzels, and finally rice krispies. The batter will be thick.
- Transfer brownie batter to prepared baking dish. Use the back of a spoon or clean hands (see tips below) to press down and spread out evenly. Top with mini marshmallows and slightly press each one into the batter. This is also a good time to add a few extra pretzels or other toppings you'd like to showcase.
- Bake in preheated oven for 20-25 minutes. The top should be golden brown and the edges slightly crisp. Let cool at least 15-minutes before cutting into squares.
Notes
- Don’t overmix the batter- Overmixing the batter can cause the blondies to be dense and not rise. Plus, you don’t want to crush the cereal too much.
- Grease hands before pressing into the pan- The batter is thick and sticky so having slick fingers will help spread the mixture evenly.
- Add a few mix-ins to the top of the blondie batter– In addition to the marshmallows, I like to add a few more broken pieces of pretzels. It looks fun and adds more crunch.
- Cereal– Lightly crushed corn flakes or corn chex. Cocoa krispies, or honey bunches of oats.
- Nuts– Use finely chopped pecans, almonds or walnuts. 1/4-1/2 cup
- Potato chips– Gently crumble plain potato chips over the top of the blondie just before baking.
- Baking chips– Use a combination of white chocolate, semi-sweet, and peanut butter chips.
- Coconut- Use sweetened or unsweetened shredded coconut. 1/4-1/2 cup
Nutrition Facts | |
---|---|
Serving size: 1 blondie | |
Servings: 12 | |
Amount per serving | |
Calories | 329 |
% Daily Value* | |
Total Fat 7.9g | 10% |
Saturated Fat 5.2g | 26% |
Cholesterol 31mg | 10% |
Sodium 165mg | 7% |
Total Carbohydrate 60.1g | 22% |
Dietary Fiber 0.8g | 3% |
Total Sugars 33.3g | |
Protein 5.3g | |
Vitamin D 3mcg | 15% |
Calcium 9mg | 1% |
Iron 2mg | 13% |
Potassium 47mg | 1% |
Nutrition
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