Soak 1/4 onion in cold water and prepare 1 corn cob.

Cut the corn kernels off the cob and roughly chop the onion.

Heat 1 tbsp butter in a pan and sauté the onion until translucent.

Add the corn kernels and another 1/2 tbsp butter, then sauté lightly.

Let the mixture cool slightly, then blend with 1.5 cups milk until smooth.