Preheat oven to 350 F degrees.
Measure out 4 cups sweet potatoes and place in large mixing bowl. Add 1+1/2 cup granulated sugar, 1/2 teaspoon salt + a dash of salt and 1 + 1/2 teaspoons vanilla extract. Turn mixer on speed 6-8 and whip while getting eggs beaten. Add beaten eggs, melted butter and cinnamon to bowl. Continue to mix on speed 6-8 for 2 minutes.