Poor Mark has had to bear
with four permutations of this cake, but I think I've finally got the
details ironed out. It's delightfully simple, richly chocolate,
and makes its own frosting all in the same pan.
First, preheat the oven
to 350 degrees and pull out a glass, 9x13-inch cake pan (or two 8x8-inch
square or two 9-inch round cake pans). Now prepare the frosting:
Melt the chocolate chips
in the microwave, being careful not to burn them. (If you start
with cold chocolate chips, it might take two minutes, but start with one
minute since that will usually melt room-temperature chips.)
Next, stir in the cream and jam. Spread the frosting mixture in
the bottom of your pan. (No grease is necessary in glass, but I'm
not sure about metal.)
Now, make the cake:
Melt the butter, then mix
in the brown sugar, eggs, yogurt, and vanilla. Add the flour,
baking soda, baking powder, salt, and cocoa (mixing the dry ingredients
first if you want, but I'm usually lazy and just add them straight to
the wet ingredients, making sure to disperse the teaspoons of leavening
and salt evenly across the batter surface). Mix in the boiling
water and pour the batter on top of the frosting in the pan.
Bake until a knife comes
out clean from the cake layer. I haven't actually tried to flip
the cake out, and instead generally just scoop individual slices out of
the pan and serve them jam-side-up, but it might work to decant the cake
for party presentation. Be sure to serve warm so the frosting is
flowable. This recipe serves 8 chocoholics or 16 people with
self-restraint.