This copycat recipe for Costco Vanilla Sheet Cake is perfect for just about any gathering. It’s home baker-friendly, and easily made in 9x13 cake pans. The end result is a hefty cake suitable for serving a large gathering. See the recipe notes for the cake cutting guide.The white cake recipe uses ‘reverse creaming’ or ‘paste method’ of mixing the batter. This refers to the first step of mixing, which is to combine the dry ingredients with the butter until a crumbly or sandy texture is…
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