Herman Coffe Cake

If you’ve been feeding a Herman sourdough starter and wondering what to do with it, this coffee cake is one of the best answers. The tangy starter acts as the base of the batter, giving the cake a subtle depth that plain flour and milk just can’t replicate.

Chocolate chips, nuts, brown sugar, cinnamon, and melted butter all go into the same bowl with the starter. One mix, into the pan, and it bakes. That’s it. The simplicity is the whole point of Herman bread recipes: the starter has already done most of the flavor work over days of fermenting.

The tablespoon of mayonnaise might raise an eyebrow, but it’s a classic bakery trick. Mayo is just eggs and oil emulsified together, and it adds richness and moisture to the crumb without any detectable mayo flavor.

Kitchen Tips

• Use a fully active, bubbly starter. If your Herman has been sitting dormant, feed it and let it work for a day before baking. A sluggish starter means a flat, dense cake.
• Don’t overmix. Stir until everything is just combined. The batter should look rough. Overworking it makes the cake tough.
• Check at 30 minutes but expect closer to 35 to 40 in most ovens. A toothpick in the center should come out with just a few moist crumbs.

Variations

• Apple Herman cake: Fold in diced apple and increase the cinnamon for a fall-flavored version.
• Streusel top: Reserve some of the brown sugar, butter, and nuts to scatter over the top before baking for a crumbly crust.
• No chocolate: Drop the chips and add raisins or dried cranberries instead for a more traditional friendship bread flavor.