How to dismantle an atomic bomb ?

Put two kilos of self raising flour into a mixing bowl, add the yoke of two eggs, three table spoons of sugar and some milk. Add some strontium 90 and some depleted uranium, add a pinch of plutonium 662. Whisk until firm and place into the oven for thirty to forty minutes. Oh sorry Bono I thought you mean't how to make an atomic cake ...