These are "Jambuster Muffins" from page 37 of Company's Coming Mostly Muffins. I made them with Strawberry Jam instead of Rasperry Jam.
They look fine here, but the muffin tin was an absolute mess! All of the jam baked up and out of them. It was all over the tin and hardly any in the muffins. As a result, they were a bit disappointing. Without enough jam to explode out of them, they were rather plain. If I make them again I will be extra careful to seal the jam into the batter better. Realistically, however, I will stick with a tried and true recipe before I use this one again! (At least the children liked them better than the pizza muffins!)