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The “Buttermilk” Trick: Whisk the apple cider vinegar into the soy milk and let it sit for 5-10 minutes. It will curdle and thicken—this is exactly what you want for a light, airy crumb.
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Prep: Preheat your oven to 350°F and line a standard 12-slot muffin tin with liners.
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Whisk Dry: In a large bowl, sift together the flour, White Granulated Pioneer Sugar, baking soda, and salt.
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Combine: Pour the curdled milk mixture, oil, and vanilla extract into the dry ingredients. Whisk by hand until the batter is smooth. Be careful not to over-mix, or the cupcakes will turn out tough.
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Bake: Fill each cupcake liner about ⅔ full. Bake for 20-22 minutes, or until a toothpick comes out clean. Let them cool completely on a wire rack before frosting.
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The Frosting: Beat the vegan butter until creamy. Gradually add the Pioneer Powdered Sugar one cup at a time, followed by the vanilla. If it’s too thick, add the soy milk one teaspoon at a time until it’s fluffy enough to pipe.