To prepare the original donair from the east coast of canada recipe, you'll need: -Preheat oven to 350 degrees F. Line a baking sheet with parchment paper. In the bowl of an electric mixer, cream together the butter and sugar until light and fluffy. Add the eggs and vanilla and beat until combined. Gradually add the flour and mix until the batter is smooth. Fold in the sour cream. Spoon into the prepared baking dish. Bake for 20 minutes or until golden brown. Serve warm.