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Malted Milk Blondies with Malted Milk Frosting

Malted Milk Blondies have a special flavor that’s reminiscent of “cereal milk”. You know how the milk at the bottom of a bowl of cereal has a sweet, slightly salty, grain flavor? Well, if you love cereal milk, you’ll really love this new malted milk recipe for bar cookies.

a malted milk blondie with malted milk frosting on a white plate

Inspired by this article on Serious Eats, I bought a big container of malted milk powder to play around with. Yes, that’s my idea of fun, what can I say? I’m a big ‘ole baking geek and proud of it.

Speaking of geeky information…

About Malted Milk Powder and why it’s a great blondie ingredient

  • Malted Milk Powder is made from malted barley, wheat, evaporated milk and a hint of baking soda and salt.
  • This recipe uses “nondiastatic” malted milk powder, which means there are no active enzymes in the powder. It’s the stuff used for flavoring milk, milk shakes and baked goods.
  • “Diastatic” milk powder has active enzymes that break down starch into sugar. Diastatic milk powder is used in bread baking.
  • The malted barley and wheat in the powder add a slightly cereal/grain flavor to the blondies and frosting.
  • The baking soda and salt in the malted milk balance out the sweetness in both the blondies and the frosting.
  • The malted milk powder milk enhances the creaminess of the frosting.

Scroll through the step by step process photos to see how to make Malted Milk Blondies

Malted milk powder being whisked into blondie batter.
The malted milk powder will be lumpy when you first add it to the batter, keep whisking.
a bowl of malted milk blondie batter
Vigorously whisk the batter until the malted milk powder dissolves. This also aerates the eggs which creates a nice crust on the blondies.
a baking pan with malted milk blondies
The blondies are baked when the middle of the batter is set and a toothpick inserted in the center comes out with a few moist crumbs.
a bowl of pudding with malted milk powder being whisked in.
For the frosting, whisk the malted milk powder into the warm “pudding” until there are no lumps.

How I created this blondie recipe:

Blondies don’t have chocolate or any other particularly assertive flavors in them. I thought a blondie might be just the right vehicle to highlight that special malted flavor.

I wanted to make a chewy, dense bar with a noticeable malted milk flavor. After a couple of tests I found that by reducing the flour and vanilla in the blondie batter I got a great texture and more of the malted milk flavor came through.

I debated if I should frost the blondies, but I’m really glad I did. Because it’s the frosting that takes the malted milk flavor and runs away with it.

I used a milk based frosting recipe for obvious reasons. I cut way back on the amount of vanilla that I would normally use for frosting. Less vanilla allows the malted milk flavor to really shine.

It’s like the cookie bar version of a malted milk shake. That doesn’t sound terrible, does it?

A blob of frosting on a malted milk blondies.
As the blondies cool they will sink in the middle a bit. Frost the blondies when they’re completely cooled.
a tray of malted milk blondies with malted milk frosting.
two frosted blondies on a white plate.
a hand holding a half eaten blondie bar.

Try these other recipes that use malted milk powder:

You might also like these wonderful Butterscotch Ripple Blondies.

You might like these fabulous brownie recipes: Classic Fudgy Brownies, Sourdough Brownies, Habanero Brownies, Chocolate Cherry Brownies, Malted Milk Brownies, Roasted Beet Brownies, and White Chocolate Raspberry Brownies.

If you love this recipe as much as I do, please consider giving it 5 stars.

two malted milk blondies on a white plate

Malted Milk Blondies with Malted Milk Frosting

Yield: 16 bars
Prep Time: 20 minutes
Bake Time: 3 minutes
Cooling Time: 1 hour
Total Time: 1 hour 23 minutes

Blondies get an extra boost of flavor from malted milk powder and the frosting has a special malted milk flavor too.

Ingredients

Batter

  • 1 1/2 sticks (6 oz, 170 g) unsalted butter, melted
  • 3/4 cups (6 oz, 170 g) granulated sugar
  • 1 cup (8 oz, 230 g) light brown sugar
  • 3 eggs
  • 1 teaspoon vanilla extract
  • 1/3 cup (2 oz, 56g) malted milk powder
  • 1 1/4 cups (6.25oz, 175g) all purpose flour
  • 1/2 teaspoon table salt

Frosting

  • 3 tablespoons all purpose flour
  • 1/2 cup (4oz, 112g) sugar
  • ¼ teaspoon salt
  • 1/2 cup (4 oz, 120ml) whole milk
  • 2 tablespoons malted milk powder
  • 1 teaspoon vanilla extract
  • 1 stick (4 oz, 112g) unsalted butter, room temperature

Instructions

  1. Preheat the oven to 350°F. Butter a 9" square baking pan. For easier removal of the bars from the pan, line the pan with parchment paper after buttering.
  2. In a large bowl, combine the melted butter with granulated and brown sugar. Add the eggs and vanilla and mix until combined. Add the malted milk powder and whisk vigorously with a hand whisk until there are no lumps of malted milk powder. Add the flour and salt and mix just until combined. Spread the batter into the pan.
  3. Bake until the center springs back when lightly pressed and a toothpick inserted in the center comes out with moist crumbs, about 30 minutes. While the bars cool, make the frosting.
  4. Combine the flour, sugar and salt in a small saucepan, whisk to combine. Slowly whisk in the milk until smooth. Heat the mixture over medium low, whisking constantly, until it begins to boil.
  5. Continue to cook and stir for 2-3 minutes until it thickens to a pudding-like texture. Immediately remove from the heat. Transfer to a bowl, whisk in the malted milk powder until smooth. Add the vanilla, cool to room temperature.
  6. Cream the butter until light and fluffy. Add the pudding, a tablespoon at a time, until completely incorporated. Switch to the whisk attachment and whip the buttercream until it’s light and fluffy.
  7. Ice the cooled bars with the frosting and cut into 16 squares.

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Did you make this recipe?

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Brian Schipper

Monday 22nd of June 2020

There is no leavening in the recipe. So is the leavening handled by the baking soda in the malt powder?

Eileen Gray

Monday 22nd of June 2020

There is a little baking soda in malted milk powder and it provides some lift. Also, vigorously mixing the batter after the eggs are added incorporates air which will also give a bit of a lift. But I don't want too much lift in blondies since I want them to be dense and rich.

Judy

Sunday 14th of July 2019

Oh My Goodness! And that's just what they are: a pan full of goodness. The blondes are super moist and chewy, and the froyo puts this recipe over the top. Thanks heaps, and keep the goodness coming.

Tolu

Friday 3rd of May 2019

please can this frosting be used to cover whole cakes

Eileen Gray

Friday 3rd of May 2019

Sure, to cover and fill an 8" cake I would double the recipe.

Meemz

Sunday 14th of April 2019

Hello,

In the post you mention that the evaporated milk enhances the creaminess of the frosting, but in the list of ingredients for the frosting you mention whole milk. Is there a mistake somewhere?

Eileen Gray

Sunday 14th of April 2019

Oh, thanks for pointing that out. It's a typo. I meant to say the "malted milk".