To eat the cookie and still have it

Wishing to be both at mass and in the procession

Wanting the sun to shine on the threshing floor, while it rains on the turnip field

You can't get both in bag and sack

The wolf ate and the goat remained whole

to have the butter and the money from (selling) the butter

Making a mountain of a mustard seed.

To make a hen out of a feather

To drown in a glass of water