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1
Preheat oven to 350F.
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2
Line 15 1/2 x 10 1/2 x 1-inch jelly roll pan with foil, leaving overhang on short sides; butter and flour foil.
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3
Sift 2 1/4 cups flour and next 5 ingredients into medium bowl.
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4
Whisk pumpkin, sour cream, honey and vanilla in small bowl to blend.
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5
Using electric mixer, beat butter in large bowl until fluffy.
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6
Gradually beat in sugar.
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7
Beat in eggs 1 at a time.
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8
Beat dry ingredients into butter mixture alternately with pumpkin mixture.
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9
Spread batter evenly in prepared pan.
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10
Bake cake until tester inserted into center comes out clean, about 25 minutes.
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11
Cool in pan on rack.
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12
Beat cream cheese, powdered sugar, 1/3 cup pumpkin, honey and allspice in large bowl until fluffy.
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13
Beat whipping cream in medium bowl until stiff peaks form.
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14
Fold whipped cream into cream cheese mixture in 2 additions.
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15
Spoon 1 1/2 cups frosting into small bowl to use for decorating; cover and refrigerate.
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16
Using foil as aid, lift cake onto work surface.
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17
Cut cake crosswise into three 10 x 4-inch rectangles (reserve remaining cake for another use).
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18
Slide spatula under 1 rectangle; transfer cake to platter.
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19
Spread with 3/4 cup frosting.
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20
Top with second cake.
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21
Spread with 3/4 cup frosting.
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22
Top with third cake.
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23
Spread 1 cup frosting in thin layer over top and sides of cake to anchor crumbs.
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24
Chill 1 hour.
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25
Spread remaining frosting from large bowl decoratively onto sides of cake.
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26
Spoon 3/4 cup reserved frosting from small bowl into pastry bag fitted with medium star tip.
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27
Pipe frosting in diagonal lines on top of cake, spacing about 3/4 inch apart.
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28
Squeeze frosting from pastry bag back into small bowl of frosting.
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29
Mix in remaining 1/4 cup pumpkin.
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30
Spoon pumpkin frosting into pastry bag and pipe lines of shells or rosettes between frosting lines on cake.
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31
Refrigerate until frosting sets, about 2 hours.
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32
(Can be prepared 2 days ahead.
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33
Cover with foil dome and keep refrigerated.
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34
Let stand 2 hours at room temperature before serving.)