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1
Melt butter in small saucepan.
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2
Add cocoa powder and stir until smooth.
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3
Stir dry ingredients together in large bowl.
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4
In a second bowl beat together water, buttermilk, eggs and vanilla with wire whip.
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5
Pour egg mixture over dry ingredients; mix together until blended.
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6
Add hot cocoa mixture and beat at medium speed for 2 minutes.
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7
Pour into greased and floured 13 x 9-inch cake pan.
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8
Bake in preheated 350 degree oven for 25 minutes or until done.
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9
Cool thoroughly.
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10
Peanut Butter Layer: Whip peanut butter and oil in small mixing bowl.
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11
When cake is thoroughly cool, spread over cake.
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12
Frosting: Put sugar and vanilla in medium mixing bowl.
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13
Melt butter in small saucepan.
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14
Add cocoa powder; stir until smooth.
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15
Add milk and heat over low heat until hot (just as it starts to bubble).
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16
Pour hot mixture over sugar and beat until smooth.
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17
Spread over peanut butter layer.
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18
Let cake sit for at least an hour before serving so frosting has time to firm up.
