Heat oven to 350ºF.  Line 24 muffin cups with paper baking cups. In large bowl, combine all cupcake ingredients at low speed until moistened; beat 2 minutes at medium speed, scraping down sides of bowl. Pour batter into prepared muffin cups.
Bake at 350ºF.for 20 to 25 minutes or until toothpick inserted in center comes out clean. Cool completely. In small bowl, beat margarine and 3 tablespoons pumpkin until well blended. Gradually add 1 cup of the powdered sugar; beat until smooth, about 1 minute. Add milk and vanilla. Gradually add remaining 1 cup powdered sugar; beat an additional 2 minutes. Spread on tops of cupcakes. Cut down 1 side to open licorice twist into triangular pieces for eyes and noses. Cut jagged curved pieces for mouths. Arrange on top of cupcakes for faces. Slice gumdrops in half; attach to head for stems.

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