Combine eggs, sugar, oil and pumpkin in a large bowl; blend well.
In separate bowl, sift together all remaining ingredients except nuts.
Gradually beat flour mix into pumpkin mixture until completely combined. Stir in nuts, if desired.
Pour batter into a greased and floured jelly roll pan/cookie sheet (12x18" or 13x17").
Bake at 350ºF for 25-30 minutes or until center springs back and it begins to pull away from the pan's sides. Cool thoroughly.
Spread with Cream Cheese Frosting and sprinkle with additional chopped nuts, if desired.