1. Preheat oven to 375 degrees F (190 degrees C). Grease a souffle dish with butter.

2. In a small saucepan, melt the butter over medium heat. Remove from heat and stir in sugar, flour, and cocoa powder until smooth.

3. In a medium bowl, beat eggs until frothy. Gradually add the butter mixture to the eggs, stirring constantly.

4. Gradually stir in milk until mixture is smooth. Pour into the prepared dish.

5. Bake for 25 to 30 minutes, or until the souffle has risen and is lightly golden. Serve immediately.