Dairy-Free Vanilla Buttercream Frosting
A fluffy dairy-free vanilla buttercream made with dairy-free butter sticks, powdered sugar, vanilla, salt, and a splash of dairy-free milk or coconut cream. It pipes, spreads, and holds up for cakes, cupcakes, cookies, and cinnamon rolls.
Recipe by Non Dairy Dude
Dude Note
Good dairy-free buttercream comes down to a few small choices: stick butter, cool room temperature, and a pinch of salt and acid so it does not taste one-note sweet. Get those right and it pipes, spreads, and tastes like the classic you remember, no dairy required.
Ingredients
Frosting
- 1 cupDairy-free butter sticks, cool room temperature
- 4 cupsPowdered sugar, sifted if lumpy
- 2 tspVanilla extract
- ¼ tspFine salt
- 3 tbspUnsweetened oat milk or full-fat coconut cream
Optional
- ½ tspLemon juice or apple cider vinegar, optional for balance
Instructions
- 1
Add the dairy-free butter to a large bowl or stand mixer bowl. Beat on medium speed for 2 minutes, until smooth, creamy, and slightly lighter.
- 2
Add 2 cups of the powdered sugar, the vanilla, and the salt. Beat on low speed until the sugar is mostly incorporated, then increase to medium and beat for 1 minute.
- 3
Add the remaining 2 cups powdered sugar and 2 tablespoons of the oat milk or coconut cream. Beat on low until combined, then increase to medium-high and beat for 2 to 3 minutes, until fluffy.
- 4
Adjust the texture. For thicker piping frosting, add a little more powdered sugar. For softer spreading frosting, beat in the remaining oat milk or coconut cream 1 teaspoon at a time.
- 5
Taste the frosting. If it tastes very sweet or flat, beat in the optional lemon juice or apple cider vinegar. Use immediately, or cover and refrigerate until ready to use.
Dairy Substitutions Used
Traditional American buttercream depends on dairy butter and milk or cream. This version uses dairy-free butter sticks for structure and buttery flavor, plus unsweetened oat milk for a neutral finish or coconut cream for a richer, slightly more stable frosting.
Tips & Variations
Use dairy-free butter sticks: Tub spreads are usually too soft and watery for frosting. Sticks behave more like traditional butter and give the frosting better structure.
Cool room temperature matters: Dairy-free butter should be soft enough to dent but not shiny, greasy, or melting. Too-warm butter makes loose frosting.
Sift only if needed: Powdered sugar clumps vary by brand. If yours looks lumpy, sift it before adding so the frosting stays smooth.
Oat milk versus coconut cream: Oat milk keeps the flavor neutral. Coconut cream makes the frosting richer and a little more stable, but it can add a faint coconut note.
Balance the sweetness: A tiny amount of lemon juice or apple cider vinegar does not make the frosting taste tart. It just helps keep dairy-free buttercream from tasting one-note sweet.
For piping: Keep the frosting slightly thicker than you would for spreading. If it warms up while decorating, refrigerate it for 10 to 15 minutes, then beat briefly.
For warm rooms or shapes that must hold: Swap 2 to 4 tablespoons of the dairy-free butter for vegetable shortening. Shortening has a higher melt point, so the frosting keeps its shape and pipes more cleanly in warm conditions. Coconut cream adds richness and a little stability, but shortening does the most for structure.
If the frosting looks greasy or separated: Dairy-free butter that got too warm can make buttercream look curdled or soupy. Refrigerate the bowl for 10 to 15 minutes, then re-whip on medium-high until it comes back together and turns fluffy.
For a layer cake: This makes enough to frost 12 cupcakes or lightly frost one 8-inch two-layer cake. For a thick bakery-style layer cake, make 1 1/2 batches.
Make ahead: Refrigerate for up to 5 days. Let it soften at room temperature, then re-whip before using.
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