Step 1

In a large bowl, beat eggs for 5 minutes. Gradually add sugar; beat 1-2 minutes longer (mixture will be thick and light in color). Add cream, milk, vanilla, 2 cups flour, cream of tartar, baking soda, salt and nutmeg; beat until smooth. Add enough remaining flour to form a soft dough.

Step 2

Turn onto a floured surface; knead until smooth, 8-10 minutes. Place in a greased bowl, turning once to grease top. Cover and refrigerate for 2-3 hours.

Step 3

On a floured surface, roll dough to 1/2-in. thickness. Cut with a lightly floured 2-1/2-in. doughnut cutter.

Step 4

In an electric skillet or deep-fat fryer, heat oil to 375°. Fry doughnuts, a few at a time, until browned, about 2 minutes on each side. Drain on paper towels.