How to glaze brownies or chocolate cake to perfection. Because, it’s all about the glaze.
Every recipe has a story, right? Well, it turns out, so does every hack.
And here it is.
I once invited my sister over for Shabbos. I told her to take the week off and not bring a thing which, of course, she ignored and showed up with 3 different cakes and a salad and also a dessert. Anyway, I have to admit that I do like when people bring stuff because that’s the only way that I get to try new things, you know? I was so bored of my Shabbos cake, and here instead were these gorgeous glazed brownies which were devoured by all.
You know how, when you slice a glazed cake, it’s impossible not to get those bumpy edges, not to mention, crumbs all over the place? Well, these squares were so cute and so perfect. They were so perfect that they looked pretty enough to serve on a platter. Even pretty enough to send for a kiddush!
I also liked the fact that it was easy for the little ones to help themselves without making an enormous mess.
So, what’s the secret? How do you glaze a sheet pan cake in a way that it cuts into perfect squares? The answer might surprise you.
You slice it up first, and glaze it after.
But hey, it makes so much sense.
But, let’s start from the beginning.

Why bake into a sheet pan? It’s the best way to achieve a maximum amount of pieces at minimum effort. We figured out that two boxes of Duncan Hines Dark Chocolate Fudge Cake Mix fit perfectly in this half sheet pan. Make sure to line it with a piece of parchment first. Or make this brownie recipe from scratch.
I baked the cake for 1 hour and 5-10 minutes until a toothpick at the center came out dry with just a few crumbs.
Once cooled, I popped the cake into the freezer for about 2 hours. That helped with cutting it with minimal crumbling. I once left it in the freezer overnight and, as a result, it was much harder to slice. I needed to wait for it to thaw first. You want it firm and semi frozen, so that it slices easily but without too much effort.

Use a large knife like this one here and make sure to cut all the way down. All. The. Way.
Also, cut it into smaller squares. It’s the perfect amount.
I generally will do rows of 12 x 6 squares. Cut out the outer edges into a neat square.

Now for the glaze (see recipe below)
I like this glaze because you mix it in a pot, and you can do that part in advance. Just heat it up a bit once you are ready to glaze the cake.

Pour the glaze over the cake all at once.

Use an offset spatula to spread the glaze evenly all over the cake.

Remove the outer layer, the “frame”. With the help of a fork, lift each piece of cake individually UP and then away and place it on a platter or a pan, for freezing.

The secret to achieving nice, perfect pieces of cake is to take your time when removing each piece, doing it slowly and carefully. The results are worth it!

This cake/brownie freezes really well and yields A LOT of pieces (about 72). So it’s perfect for sending to a simcha or, to stock up your freezer. It’s really nice to have 4-5 pans of cut cake to pull out one each Shabbos morning!
Chocolate Glaze
Ingredients
- 1½ cups confectioners sugar
- ¼ cup water
- ¼ cup + 1 tbsp oil
- 3 tbsp cocoa powder
Instructions
- Mix all ingredients in a small pot, over medium heat. Use a whisk to mix until combined and smooth. (You can do this part in advance. Just heat it up a bit once you are ready to glaze the cake.)
- Pour over the cake while still warm but not hot. Use an offset spatula to spread over the cooled cake.
Notes

Can these be frozen after they are glazed and still look beautiful?
For sure!
can you link a good moist chocolate cake to use, for those of us who don’t use the OU hechsher?
Best chocolate cake ever is the Hershey’s cake from their website.
https://www.hersheyland.com/recipes/hersheys-perfectly-chocolate-chocolate-cake.html
That does look good, I wonder if it’s the texture and denseness needed for this recipe to get those pretty squares
Yes please post a good moist choc cake in a cookie sheet thanks
https://www.food.com/recipe/moist-deluxe-dark-chocolate-cake-mix-copycat-duncan-hines-129855
Was just coming here to ask for a good recipe for such a cake! Please?????
This looks great. Like another poster asked, can you freeze this once the cake has been glazed?
sure can :]
I don’t have a half sheet pan. How many boxes do I need for a cookie sheet?
I would stick with the same amount. “Two boxes of Duncan Hines Dark Chocolate Fudge Cake Mix fit perfectly in this half sheet pan”
The difference in size, cookie sheet to half sheet, is just a couple inches…
Please – a recipe that would work similarly to the cake mix, for those who dont use that hechsher or dont like all the chemicals in the mixes. Thank you!!!!
Made this for Shabbos and I’m not saying how many I already ate!!
They are heaven! Thank you!
Nothing stopping you using your own brownie or chocolate cake recipes it’s just to get ideas
Yes but I would think a specific density/level of fluffiness is needed here to get the pieces to cut so nicely. It’s a ton of patchkediky work for it to not come out right.
Thanks for great tip!!!
You suggest freezing cake first, but then glazing cake when still warm. How does that work? Thanks.
That’s a good point. What are you supposed to do?
I think they mean while the glaze is still warm. Pour warm glaze over the cool cake.
To avoid bubbles forming in the glaze: add only part of the liquid ingredients first forming a paste. Then slowly incorporate the rest of the liquid. Enjoy!
Is the word dessert supposed to be a link to a specific recipe? Cuz it doesn’t have work