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1
In a small saucepan, combine 1 cup water, 1/2 cup of the sugar, the chocolate and the vanilla.
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2
Heat over medium heat, stirring constantly, until melted.
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3
Set aside to cool.
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4
Preheat the oven to 350 degrees F.
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5
Prepare three 9-inch round cake pans: spray the bottom and sides of each pan with cooking spray; line the pans with parchment paper; then spray again with cooking spray.
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6
Sift together the flour, baking powder and salt.
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7
In a stand mixer, cream the butter and the remaining 1 3/4 cups sugar until smooth.
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8
Add the eggs, one at a time, beating after each addition.
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9
Add the cooled chocolate mixture and beat until smooth.
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10
Add the sifted flour mixture alternately with the milk, starting with a third of the flour, then adding half the milk, and ending with the flour.
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11
Stir only enough after each addition to blend the ingredients.
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12
Pour the batter evenly into the cake pans and bake for 35 minutes, or until done.
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13
Judge doneness by appearancelayers will begin to pull away from the sidesor by inserting a toothpick into the center of a layer.
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14
The toothpick should come out clean.
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15
Cool the cakes in the pans for 10 minutes, then turn them out onto racks.
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16
Remove the paper and allow to cool completely before frosting.
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17
Spread the Divinity Icing between the layers and all over the top and sides of the cake.
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18
Pour the egg whites and salt into a stand mixer fitted with a whip attachment.
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19
Beat the egg whites until smooth but not stiff; they should not form stiff peaks.
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20
In a large saucepan, mix the sugar, 3/4 cup water, corn syrup and vinegar.
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21
Stir until the sugar dissolves, then heat the mixture until it reaches the hard ball stage (265 degrees F on a candy thermometer), about 12 minutes.
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22
When done, the syrup will spin a long thread when poured off the edge of a spoon.
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23
Remove the syrup from the heat and stir in the mini marshmallows.
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24
The mixture will be foamy.
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25
With the mixer running at high speed, stream the syrup into the egg whites.
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26
Beat well, and then beat in the vanilla.