Courtesy my brother:
2 large eggs
3/4 c sugar
2 c heavy cream
1 c milk
Whisk eggs until light and fluffy, 1 to 2 minutes. Whisk in the sugar, a
little at a time, then continue whisking until completely blended, about 1
minute more. Pour in the cream and milk and whisk to blend.
Makes 1 quart.
If you want extras (cookies and cream, for example), add the crumbled oreos, chips, whatever, at the very end, churn until mixed, and freeze. Don't add too much, though, because the mixture can overflow.