Pure butter is great. It really is. But if you’ve ever tried to pipe a delicate rose onto a cupcake in a room that’s over 75 degrees, you know the heartbreak of watching your hard work turn into a puddle of sugary soup. That’s exactly why the "crust" method—aka a buttercream frosting recipe with crisco and butter—is basically the secret weapon of professional bakers who actually have to transport cakes in the real world.
Some people get all snobby about shortening. They’ll tell you it’s "fake" or "waxy." Honestly? They’re missing the point. When you mix the two, you get the flavor of high-quality butter with the structural integrity of a skyscraper. It stays white. It stays stiff. It tastes like childhood.
The Science of Why We Mix Fats
Butter melts at roughly body temperature, which is about 98°F. That’s why it feels so amazing on your tongue. It literally dissolves. However, vegetable shortening like Crisco has a much higher melting point, usually sitting somewhere around 115°F.
Think about that for a second.
By introducing a bit of shortening into your bowl, you’re raising the heat tolerance of your entire batch of frosting. It’s the difference between a cake that looks perfect at a backyard BBQ and one that looks like a Pinterest fail. Plus, butter contains about 15-20% water. Shortening is 100% fat. That lack of water means your frosting is less likely to break or curdle when you start adding flavorings like heavy cream or fruit purees.
Getting the Ratio Right
You can't just throw things in a bowl and hope for the best. Well, you can, but it’ll probably be grainy.
Most pros lean toward a 50/50 split or a 60/40 butter-heavy split. If you go too heavy on the shortening, you lose that "melt-in-your-mouth" quality and end up with a film on the roof of your mouth. Nobody wants that. If you go too heavy on the butter, you’re back to square one with the melting issues.
For a standard batch that covers a two-layer cake, you’re looking at:
- 1 cup (2 sticks) of unsalted butter, slightly softened
- 1 cup of vegetable shortening (the sticks are easier to measure than the tubs)
- 7 to 8 cups of powdered sugar
- 2 teaspoons of clear vanilla extract (use brown if you don't care about the color)
- 3-4 tablespoons of heavy cream
- A pinch of fine sea salt (don't skip this, or it'll be sickeningly sweet)
Temperature is everything
Don't use melted butter. Don't use cold butter. You want it "room temperature," which in baker-speak actually means about 65°F. If you press it with your thumb, it should leave an indent but not slide around. If your kitchen is hot, your butter is already too soft. Stick it back in the fridge for ten minutes.
The Mixing Method Most People Mess Up
The biggest mistake? Not beating the fats long enough.
You need to cream the butter and Crisco together for at least five full minutes before a single grain of sugar touches the bowl. You want it to look like white clouds. This aeration is what makes the frosting light instead of dense and greasy.
Once you start adding the powdered sugar, do it slowly. One cup at a time. If you dump it all in at once, you’ll be standing in a cloud of sugar dust, and your mixer will hate you.
Why clear vanilla matters
If you’re making a wedding cake or anything where you want a "stark white" finish, use clear vanilla. Real vanilla extract is dark brown. Since butter is yellow, the combination usually results in an off-white or ivory color. Shortening helps whiten the mix, but clear vanilla keeps it looking like fresh snow.
Troubleshooting Your Buttercream
Sometimes things go sideways. It happens to everyone.
If your frosting looks "pockmarked" or has too many air bubbles, you probably over-mixed it at a high speed. Switch to the paddle attachment and turn your mixer to the lowest possible setting for about five minutes. This "massages" the air out and makes it silky smooth for spreading.
Is it too stiff? Add cream, one teaspoon at a time.
Is it too soft? Add more sugar.
Is it too sweet? Add an extra pinch of salt or a tiny drop of lemon juice. The acidity cuts through the sugar without making it taste like lemon.
The "Crusting" Factor
One of the coolest things about a buttercream frosting recipe with crisco and butter is that it "crusts." This means the outer layer dries just enough to be firm to the touch, while the inside stays soft.
This is huge for decorators.
It allows you to use the "Viva Paper Towel" method (a classic baker's trick) where you lay a non-textured paper towel over the crusted frosting and lightly smooth it with your hand to get a finish that looks like fondant but tastes a million times better.
Storage and Longevity
Because of the shortening, this stuff lasts.
You can keep it in an airtight container at room temperature for a couple of days, or in the fridge for two weeks. If you freeze it, it’ll last three months. Just make sure you bring it back to room temperature and give it a quick whip before you try to use it, or it’ll be too stiff to pipe.
Making This Recipe Your Own
Don't feel like you're stuck with vanilla. This base is a blank canvas.
- Chocolate: Add 1/2 cup of high-quality cocoa powder and an extra splash of cream.
- Salted Caramel: Swirl in 1/4 cup of cooled caramel sauce at the very end.
- Strawberry: Use freeze-dried strawberry powder instead of fresh berries to avoid adding too much moisture.
Moving Forward With Your Bake
To get started, clear off a large workspace and ensure your butter is at that perfect 65°F mark. Measure out your shortening first—if you're using the tub, grease your measuring cup with a little cooking spray so it slides right out.
Begin by beating your fats on medium-high speed. Set a timer for five minutes. Do not cheat. While that's mixing, sift your powdered sugar. Yes, sifting is annoying, but it is the only way to guaranteed a lump-free finish that won't clog your piping tips. Once the fats are pale and fluffy, drop the speed to low and gradually incorporate the sugar and liquids.
Once the texture is right, do a "spread test" with a spatula on a piece of parchment paper. If it glides without tearing or sagging, you're ready to frost.