Sweetened Condensed Milk Blondies are my kind of dessert bar when I want something chewy, buttery, and reliably rich. They’re blondies, but with a slightly denser bite and that caramel-ish depth you get from brown sugar.
The sweetened condensed milk gives these a fudgy blondie feel in the center, while the edges bake up a little firmer (which I love for clean squares). They’re one-bowl and straightforward, and the chocolate chips make them taste like a cross between a blondie and a soft cookie bar.
I make these a lot for cookie trays, potlucks, and weekend baking when I want something that holds up well on the counter. They’re also good cut small and served alongside coffee or tucked into lunchboxes.
Why You’ll Love This Recipe
Soft and Chewy: The texture is the whole point here—set edges and a chewy center that stays rich even the next day.
Extra Rich: Sweetened condensed milk makes these taste a little more “buttery bar” than a plain blondie, in a good way.
One Bowl: You don’t need a mixer, and you don’t need to dirty a bunch of dishes to get great results.
Chocolate Chip Classic: Semisweet chips give you little pockets of chocolate without taking over the blondie flavor.
Easy to Switch Up: Walnuts are optional, and you can swap the chips for butterscotch or white chocolate depending on what you like.
Ingredients You’ll Need
Batter
- Unsalted butter: Melted butter keeps this recipe simple and gives the bars that dense, chewy bite. I let it cool a bit so it doesn’t scramble the eggs.
- Light brown sugar: This is where the blondie flavor really comes from. Dark brown sugar works too if you want a deeper molasses note.
- Sweetened condensed milk: The key ingredient here. It makes the bars richer and helps the center stay soft and a little fudgy.
- Eggs: Room temp is helpful so they mix in smoothly. They give the bars structure so you can slice them cleanly.
- Vanilla extract: Don’t skip it. It makes the whole pan taste more like a real blondie and less like plain sweet bars.
- All-purpose flour: I use regular flour here. Measure it the usual way (spoon and level) so the batter doesn’t get too thick.
- Baking powder: Just enough lift so the bars don’t bake up heavy and flat.
- Fine salt: Necessary with sweetened condensed milk. It keeps the sweetness in check and helps the flavor pop.
Mix-ins
- Semisweet chocolate chips: Semisweet is my go-to here. Milk chocolate works if that’s what you have, but the bars will taste sweeter.
- Walnuts (optional): I like them for crunch, but you can leave them out. Pecans also work if you want a softer nut.
Recipe Instructions
- Preheat the oven: Heat the oven to 350°F and set a rack in the center.
- Prep the pan: Line a 9×13-inch pan with parchment paper, then lightly grease it so the corners release easily.
- Whisk butter and sugar: In a large bowl, whisk the melted (slightly cooled) butter and brown sugar until smooth.
- Add the condensed milk: Whisk in the sweetened condensed milk until fully blended.
- Add eggs and vanilla: Whisk in the eggs and vanilla extract until the mixture looks uniform and glossy.
- Add the dry ingredients: Fold in the flour, baking powder, and salt just until you don’t see dry flour anymore.
- Fold in the mix-ins: Fold in the chocolate chips and walnuts (if using), then spread the batter evenly in the pan.
- Bake: Bake for 23 to 28 minutes, until the edges are set and the center is just set with a few moist crumbs.
- Cool and slice: Cool completely in the pan for clean slices, then lift out using the parchment and cut into squares.
Some of my tips!
This is the part that really makes a difference. If you only read one section, make it this one because this is where I share the little trick that helps the recipe turn out so well.
Recipe Tips & Tricks
Don’t overbake them. Pull the pan when the center is just set and you still get a few moist crumbs. If you wait for the middle to look totally firm, the blondies will bake up drier than you want.
Cool all the way before slicing. These need time to set, especially with the condensed milk in the batter. If you cut too early, the centers will stick to the knife and the squares won’t look as neat.
Use parchment with overhang. It makes lifting the whole slab out of the pan easy, and it helps you get clean edges without digging around with a spatula.
Fold the flour in gently. Stop as soon as you don’t see dry flour. Overmixing can make blondies tough and more cake-like.
Try a different chip. Butterscotch chips are great here if you want a more old-school blondie flavor. White chocolate chips are also good, especially with walnuts.
Make some touches!
There are plenty of easy ways to serve this depending on the occasion. Keep it simple, or add a few small touches to make it feel a little more special.
Serving Suggestions
- Milk: A cold glass of milk is classic with these. I like it best when the blondies are cut a little small so they feel more snacky.
- Coffee or espresso: These are really good with coffee, especially if you add walnuts. A latte or cappuccino is nice if you’re serving them as a simple dessert.
- Ice cream: Serve a square with vanilla ice cream on the side. If you want something extra, drizzle a little chocolate sauce over the top.
- Fruit: Fresh berries are nice with rich bars like this. Strawberries or raspberries are the ones I reach for most.
Save it for later
This section covers how to store leftovers and what parts of the recipe you can prepare ahead of time.
Storage and Make Ahead
Store them airtight at room temperature and they’ll stay chewy and sliceable for a few days. I usually keep them in a container with parchment between layers so the tops don’t get sticky.
If you want to make these ahead, bake the pan the day before and leave the bars uncut until you need them. They slice more cleanly once they’ve had time to fully cool and set.
If you want them to last longer, you can freeze individual portions or freeze a whole slab wrapped well. Let them thaw at room temperature, or in the fridge overnight if you prefer.
A few quick answers
This section covers a few extra details that may help before you head to the recipe card.
Recipe FAQs
Can I use a 9×9-inch pan instead of 9×13?
Yes. A 9×9-inch pan will give you thicker bars. Bake them longer, about 28 to 35 minutes, and use the same doneness cue: set edges and a center that’s just set.
How do I know when blondies are done?
I look for edges that are set and lightly golden, and a center that doesn’t look wet or jiggly. A toothpick should come out with a few moist crumbs, not raw batter.
Can I swap the chocolate chips for something else?
Definitely. Butterscotch chips and white chocolate chips both work really well. You can also do a mix, like half semisweet and half butterscotch.
Can I add espresso powder?
Yes, and it’s a nice addition if you want a deeper chocolate flavor. Stir about 1 tablespoon into the dry ingredients so it distributes evenly.
Do I have to use walnuts?
No, you can leave them out. If you do want nuts, pecans are a good swap and bake up a little softer than walnuts.
You might also like
Before you go, take a look at a few other recipes below the recipe card. They use similar ingredients in a different way and are worth saving too.
MORE DINNER RECIPES TO TRY
Sweetened Condensed Milk Blondies
INGREDIENTS
Batter
- 1/2 cup unsalted butter melted and slightly cooled
- 1 cup light brown sugar packed
- 1 can 14 oz sweetened condensed milk
- 2 large eggs room temperature
- 2 tsp vanilla extract
- 1 1/2 cups all-purpose flour
- 1 tsp baking powder
- 1/2 tsp fine salt.
Mix-ins
- 1 cup semisweet chocolate chips
- 1/2 cup chopped walnuts optional.
INSTRUCTIONS
Prep
- heat oven to 350 F and place rack in center
- line a 9x13 inch pan with parchment paper and lightly grease
- whisk melted butter and brown sugar until smooth then whisk in sweetened condensed milk
- whisk in eggs and vanilla until fully combined.
Bake and Cool
- fold in flour baking powder and salt just until no dry flour remains
- fold in chocolate chips and walnuts if using then spread batter evenly in pan
- bake until edges are set and center is just set with a few moist crumbs 23 to 28 minutes
- cool completely in pan for clean slices then lift out and cut into squares.
