Crush the cookies

• Break the Oreo cookies into pieces and crush them into a fine crumb, keeping a few whole for decoration.

Make the batter

• Warm the milk in a saucepan.
• Mix the crushed cookies with the baking powder in a bowl.
• Pour in the warm milk and stir until you get a smooth, thick batter.

Pour into the pan

• Pour the batter into a lined springform pan and smooth the top.
• Scatter the reserved crushed cookies over the surface.

Cook without an oven

• Cook the cake covered over low heat until set and a toothpick comes out clean.
• Alternatively steam it in a covered pan over simmering water.

Chill and serve

• Let the cake cool, then refrigerate until firm.
• Unmold, decorate with the whole Oreos and slice.