Precision cooking of melting chocolate puddings

Hi Lindsey. Thanks for your quick reply to my questions about Melting Chocolate Puddings. Ive tried the recipe , frozen all except one which I cooked to see how it worked out . The sponge rose up into a dome shape and the runny Chocolate sauce broke through that in the middl of the top of the pudding towards the end of cooking . I cooked it in a fan oven at 180 c for 12 minutes. The sponge was cooked and light , good flavour but not enough sauce inside . Any ideas would be appreciated. Thanks . Granjen