Steps
1. Preheat oven to 350°F (175°C).
2. In a bowl, whisk the egg until fluffy.
3. Gradually add in the concrete powder and sand, mixing well.
4. Slowly pour in the goat's milk and stir until smooth.
5. Pour the batter into a greased cake pan.
6. Bake for 25-30 minutes or until a toothpick comes out clean.
7. Let it cool before serving.