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1
Place chocolate in medium bowl.
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2
Bring cream and corn syrup to simmer in small saucepan.
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3
Pour hot mixture over chocolate; add extract and let stand 1 minute.
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4
Whisk until mixture is smooth.
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5
Let filling stand at room temperature while cake is baking and cooling.
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6
Position rack in lowest third of oven and preheat to 350F.
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7
Butter 9-inch-diameter cake pan with 2-inch-high sides.
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8
Line bottom with parchment paper.
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9
Butter parchment.
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10
Dust pan with flour.
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11
Whisk first 5 ingredients in medium bowl to blend.
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12
Using electric mixer, beat butter in large bowl until light and fluffy.
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13
Gradually beat in both sugars, then vanilla.
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14
Add eggs 1 at a time, beating well after each addition.
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15
Beat in dry ingredients alternately with buttermilk in 2 additions each.
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16
Mix in chocolate chips.
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17
Transfer batter to prepared pan.
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18
Bake cake until tester inserted into center comes out clean, about 1 hour 5 minutes.
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19
Cool cake in pan on rack 5 minutes.
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20
Turn out cake onto rack.
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21
Peel off parchment.
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22
Cool completely.
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23
Using electric mixer, beat filling until fluffy and lightened in color, about 30 seconds.
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24
Using serrated knife, cut cake horizontally in half.
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25
Place 1 layer, cut side up, on rack set over baking sheet.
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26
Spread filling over.
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27
Top with second layer, cut side down.
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28
Chill filled cake 20 minutes.
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29
Stir chocolate, butter, and corn syrup in heavy small saucepan over low heat until melted and smooth.
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30
Mix in extract.
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31
Cool glaze until just lukewarm but still pourable, stirring occasionally, about 20 minutes.
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32
Pour 1/2 cup glaze over center of cake.
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33
Spread over top and sides of cake.
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34
Chill until glaze sets, about 15 minutes.
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35
Pour remaining glaze over center of cake, then spread quickly over top and sides.
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36
Chill until glaze sets, about 1 hour.
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37
(Can be made 1 day ahead.
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38
Cover with cake dome; chill.
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39
Before continuing, let stand at room temperature until softened, about 4 hours.)
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40
Sprinkle candies around top edge of cake.
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41
Garnish with fresh mint leaves.