Yes, plain granulated sugar can turn into a fine powder in a strong blender, though it still won’t match boxed confectioners’ sugar in every recipe.
Powdered sugar looks simple. It’s just sugar, right? Sort of. That’s why this kitchen shortcut can go from “good enough” to “why is my frosting gritty?” in one bowl.
If you only have granulated sugar in the pantry, a blender can save the day. For dusting brownies, sweetening whipped cream, or making a loose glaze, homemade powdered sugar often does the job. For silky buttercream, firm royal icing, and bakery-smooth frostings, the gap between homemade and store-bought gets a lot easier to notice.
The real question isn’t whether a blender can crush sugar. It can. The real question is what kind of powdered sugar you end up with, how fine it gets, and where that swap starts to fall apart.
This article breaks that down in plain language. You’ll see when blending sugar works, when it falls short, how to make it with a better texture, and which recipes forgive the shortcut.
What Powdered Sugar Actually Is
Powdered sugar, also called confectioners’ sugar or icing sugar, is granulated sugar milled into a much finer texture than the sugar you spoon into coffee. That fine grind is the whole point. It dissolves fast, blends into butter with less fuss, and leaves fewer gritty bits behind.
Many store-bought brands also include a small amount of cornstarch. That part matters more than most people think. Cornstarch helps stop clumping in the bag, and it can also change how frostings, glazes, and dusting sugar behave on the food. Domino’s powdered sugar FAQ notes that powdered sugar is crushed into a fine powder and cornstarch is added to prevent caking.
So when you blitz granulated sugar at home, you’re making one part of the product. You’re getting the fine sugar. You are not always getting the same particle size, and you are not getting the anti-caking starch unless you add it yourself.
That’s why homemade powdered sugar can look nearly identical in a bowl, then act a little different once liquid, butter, cream cheese, or egg white enters the mix.
When A Blender Turns Sugar Into Something Close Enough
A decent blender, spice grinder, or food processor can grind sugar into a powder. The finer the blade action, the better the result. High-speed blenders usually do the cleanest job. Small spice grinders can work even better for tight batches, since the sugar stays closer to the blade.
You’ll get the best result with dry, plain white granulated sugar. If the sugar has picked up moisture and formed tiny lumps, the powder will stay uneven. Pulse it first, then run the machine until the sugar looks fluffy and soft, not sandy.
Homemade powdered sugar works best when the recipe doesn’t demand showroom-smooth texture. Think finishing sugar on French toast, a light glaze for muffins, sweetening homemade whipped cream, or stirring into cocoa where a tiny bit of grit won’t ruin the whole thing.
It can also bail you out when you only need a small amount. Running to the store for one cup of powdered sugar feels silly when a blender can get you close in two minutes.
Blending Granulated Sugar Into Powdered Sugar At Home
The process is easy, though a few small choices change the result a lot.
Start With The Right Sugar
Use plain white granulated sugar. Coarse raw sugar can be ground, though it tends to stay a little rougher. Brown sugar is a poor pick here since the molasses makes it sticky. Coconut sugar and similar substitutes can be powdered, though they won’t behave like standard confectioners’ sugar in icing.
Use A Small Batch
A packed blender jar sounds efficient, though it often gives you uneven grind. The sugar near the blade turns powdery first while the top layer stays grainy. One to two cups is a sweet spot for many machines. With a spice grinder, half a cup can be plenty.
Blend Longer Than You Think
A quick blitz makes superfine sugar, not true powdered sugar. You want the texture to feel soft between your fingers. Stop, let the sugar dust settle, then check it. If it still feels sandy, keep going.
Sift It
This step gets skipped all the time, and that’s where a lot of failed “homemade powdered sugar” stories begin. Sifting pulls out stubborn crystals that can turn glaze gritty. If you see coarse bits left in the sieve, blend those again.
Add Cornstarch When The Recipe Calls For Stability
If you’re making frosting, glaze, or icing, adding a little cornstarch gets you closer to the texture of a boxed product. Many bakers use about 1 tablespoon cornstarch per cup of granulated sugar before blending. That won’t turn it into factory-milled confectioners’ sugar, though it does help with clumping and body.
King Arthur Baking also describes confectioners’ sugar as finely blitzed sugar with a bit of cornstarch to stop clumping in its guide to different types of sugars, which lines up with what most home bakers notice in practice.
Where Homemade Powdered Sugar Works And Where It Doesn’t
This is where expectations matter. Homemade powdered sugar is a handy pantry fix. It is not a perfect clone.
If all you need is a dusting over pancakes or a fast lemon glaze for loaf cake, blending sugar can be a clean win. If you need snowy, dry sugar that sits neatly on a warm doughnut without melting fast, boxed sugar still has the edge. If you’re making frosting for a birthday cake and want a smooth finish with no sandy bite, store-bought is still the safer bet.
The texture gap shows up most in recipes with just a few ingredients. In a simple glaze, every grain stands out. In buttercream, those grains may soften after mixing, though not always enough. In baked fillings or batters, the difference can shrink since heat and extra liquid help the sugar dissolve.
| Use | Homemade Powdered Sugar | Store-Bought Powdered Sugar |
|---|---|---|
| Dusting cakes or brownies | Works well if sifted | Works well and stays finer |
| Loose glaze for muffins | Usually works | Works with smoother finish |
| Whipped cream sweetening | Often works in small amounts | Works and dissolves fast |
| American buttercream | Can turn slightly gritty | Better texture and easier mixing |
| Royal icing | Risky unless very finely ground | Better for smooth piping |
| Cookie icing glaze | Works if well sifted | More even finish |
| Fondant or candy work | Less reliable | Safer texture |
| Dusting doughnuts | Melts faster and can clump | Holds better |
What Changes The Texture Most
Three things decide whether your homemade batch feels smooth or disappointing: machine power, blending time, and sifting. A weak blender can still break sugar down, though it may stop at superfine sugar. That’s useful for meringue or sponge cake, though it isn’t the same as powdered sugar.
Humidity also messes with the result. Sugar grabs moisture from the air fast. If your kitchen is warm and sticky, the powder may clump as soon as it cools. That can make you think the blender failed when the room is doing half the damage.
Storage matters too. Freshly blended sugar is at its best right after sifting. If you stash it without cornstarch in a loose container, it can pack together and lose that fluffy texture by the next day.
Why Store-Bought Often Feels Smoother
Commercial powdered sugar is milled much finer and more evenly than most home machines can manage. That even grind changes the mouthfeel. You notice it most in frosting. Homemade sugar may still sweeten the bowl just fine, though your tongue catches a faint grain that boxed sugar avoids.
Cornstarch also changes the way the sugar behaves once liquid hits it. That can help a glaze set with a nicer finish instead of staying wet and shiny too long.
Best Method For Homemade Powdered Sugar
If you want the closest match at home, keep the method simple and repeatable.
- Measure 1 cup granulated sugar.
- Add 1 tablespoon cornstarch if the batch is for frosting, icing, or storage.
- Blend on high until the sugar looks fluffy and loose.
- Let the dust settle before opening the lid.
- Sift into a bowl.
- Reblend any coarse crystals left behind.
- Use right away or store airtight.
That method gives you a better shot at a fine texture with less waste. If you skip the cornstarch, the sugar still works for dusting and many glazes. If you skip the sifter, you’re gambling with texture.
| Problem | Why It Happens | Fix |
|---|---|---|
| Sugar still feels gritty | Blend time too short or machine too weak | Blend longer in smaller batches, then sift |
| Powder clumps in the jar | Moisture in the air or no starch added | Store airtight and add a little cornstarch |
| Frosting tastes sandy | Particles stayed too large | Use store-bought next time or reblend and sift twice |
| Glaze looks dull and thick | Too much starch or uneven grind | Add liquid a few drops at a time and whisk well |
| Powder sprays out of the blender | Lid opened too soon | Wait 30 seconds before opening |
Recipes That Forgive The Shortcut
Some recipes are easygoing. Others are fussy. Homemade powdered sugar shines most in recipes where the sugar has room to dissolve fully or where a tiny bit of texture fades into the background.
Good Places To Use It
Use it for pancake dusting, brownie topping, French toast, quick vanilla glaze, sweetened whipped cream, sweet dips, no-bake dessert finishing, and cocoa. It also works in some cookie icings if you’ve blended and sifted it well.
Less Forgiving Uses
Be more careful with wedding-cake style buttercream, stiff piping icing, macarons that rely on ultra-fine dry ingredients, marshmallow fondant, and any recipe where a polished finish is half the point. In those cases, a box of confectioners’ sugar buys you a smoother result with less fiddling.
Can You Use A Food Processor Or Coffee Grinder Instead?
Yes. In fact, small machines often beat big blenders for this job. A coffee grinder, cleaned well first, can make a very fine powder from a small batch. A food processor works too, though it may take longer and leave more coarse crystals unless you process a decent amount.
The machine you already own is often the right one. The only hard rule is this: test the texture with your fingers, then sift. The eye can fool you. Your fingertips won’t.
So, Is Blended Sugar The Same As Powdered Sugar?
Not quite. It can be close enough for plenty of kitchen jobs. It is still a substitute, not a twin. The finer and drier your batch, the closer it gets. Add a little cornstarch and sift it well, and you can pull off a lot more than people expect.
If your recipe needs sugar to vanish into a frosting or icing with no trace, store-bought powdered sugar is still the safer call. If you just need a fast homemade stand-in and your standards are sane, blending sugar works better than many people think.
That’s the honest answer: yes, a blender can make powdered sugar from granulated sugar, though the finish depends on the machine, the method, and what you plan to bake next.
References & Sources
- Domino Sugar.“Domino Sugar Product FAQs.”States that powdered sugar is crushed into a fine powder and includes cornstarch to prevent caking.
- King Arthur Baking.“A Guide To Different Types Of Sugars, How To Use Them, And When To Substitute.”Explains that confectioners’ sugar is finely blitzed sugar with a bit of cornstarch and shows how that texture fits icing and glaze recipes.