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Combine the pumpkin, cinnamon, nutmeg, cloves, ginger, and allspice in a small bowl. Mix until combined. Set aside.
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Combine the gelatin and ¼ cup cold water in a large bowl. Set aside.
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Combine the sugar, corn syrup, salt, and ¼ cup cold water in a small saucepan. Cook over medium high heat until the sugar dissolves.
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Raise heat to high and cook until mixture reaches 240 degrees. Remove from heat.
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On a low speed, beat the dissolved gelatin, slowly pouring the sugar mixture into it.
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Beat on high speed until the mixture is very thick, about 15 minutes.
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Add the vanilla and pumpkin mixture. Beat until fully incorporated. Stir in a few drops of orange food coloring, if desired.
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Using a mesh sieve, generously dust an 8x12 inch glass baking dish with powdered sugar. Pour the marshmallow mixture into the dish. Smooth the top and dust with more powdered sugar.
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Allow mixture to stand for 8 hours or until it dries out.
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Once dried, turn out the marshmallows onto a cutting board. Cut into Mickey shapes using a small cookie cutter. Dust with more powdered sugar.