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1
Preheat oven to 350F
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2
Place teaspoon of butter in each of 3 round 9-inch layer cake pans and place pans in oven for a few minutes until butter melts.
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3
Remove pans from oven, brush interior bottom and sides of each with butter and line bottoms with parchment.
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4
Whisk cake flour, cocoa and salt in a bowl.
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5
Place oil and sugar in bowl of an electric mixer and beat at medium speed until well-blended.
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6
Beat in eggs one at a time.
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7
With machine on low, very slowly add red food coloring.
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8
(Take care: it may splash.)
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9
Add vanilla.
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10
Add flour mixture alternately with buttermilk in two batches.
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11
Scrape down bowl and beat just long enough to combine.
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12
Place baking soda in a small dish, stir in vinegar and add to batter with machine running.
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13
Beat for 10 seconds.
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14
Divide batter among pans, place in oven and bake until a cake tester comes out clean, 40 to 45 minutes.
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15
Let cool in pans 20 minutes.
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16
Then remove from pans, flip layers over and peel off parchment.
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17
Cool completely before frosting.
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18
Frosting: Place cream cheese and butter in a medium bowl.
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19
With a hand-held electric mixer, beat until light and fluffy, about 2 minutes.
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20
Add sugar and vanilla.
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21
Beat, on low speed to combine.
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22
If too soft, chill until slightly stiff, about 10 minutes, before using.