Peanut Butter Jam Coffee Cake

This is a PB&J sandwich gone sideways into coffee cake territory: a peanut butter batter built on biscuit mix, with jam marbled through the top before it hits the oven. It bakes up tender, a little crumbly, and tastes exactly like the after-school lunch you remember.

Using biscuit mix as the base is what keeps this honest. Skip the fussy mixing method, skip the separate leavening, just cream the peanut butter and sugar, stir in everything else, and you’re done in about ten minutes of active work.

The knife-swirl technique for marbling actually matters here. Drag the tip of the knife in a figure-eight pattern through the batter rather than stirring, which would just streak the jam evenly and lose the pretty pockets of fruit on top.

Use a thick jam, not jelly or preserves with big fruit chunks. Strawberry, raspberry, and grape all work beautifully. If your jam is too loose, simmer it in a small pan for two minutes to thicken it before spooning on.

Pro Tips

• Bring the egg, milk, and peanut butter to room temperature first for a smoother batter that mixes evenly.
• Don’t over-marble. Three or four swirls is plenty; more and the jam disappears into the batter.
• Test with a toothpick in the cake part, not through a jam pocket, since the jam stays gooey.
• Wrap leftovers in plastic and store on the counter for two days. The jam softens the crumb beautifully overnight.

Variations

• Use almond butter and apricot jam for a more grown-up version.
• Sprinkle a streusel of brown sugar, oats, and butter over the top before baking.
• Stir in mini chocolate chips for a peanut butter cup vibe.