In a large mixing bowl, beat eggs, sugar, pumpkin and melted butter until smooth. Add remaining ingredients and beat for 2-3 minutes until fully combined.

Pour batter into a lightly greased 15x10x1 inch baking sheet. Bake in a 350 degree oven for 25-30 minutes.

Remove and cool completely before frosting.

For the frosting, combine brown sugar, 2 Tbsp butter and milk in a small saucepan over low heat. Whisk until sugar dissolves. Remove from heat and cool completely.

In a large mixing bowl, beat ½ cup softened butter with powdered sugar. Pour in cooled brown sugar mixture. Beat for 3-4 minutes until light and fluffy. Fold in chopped pecans.

Spread frosting over cooled pumpkin bars. Press pecan halves gently into top of bars. Cut and store in an airtight container in refrigerator. Or, freeze until ready to use.