Upside-Down Rhubarb Muffins

The upside-down cake trick works even better in muffin form. Chopped rhubarb mixed with melted butter and brown sugar goes into the bottom of each cup, then a tender, nutmeg-scented batter gets spooned on top. Twenty-five minutes later, flip them out and you’ve got individual cakes with a sticky, caramelized rhubarb topping that’s tart and sweet in equal measure.

Rhubarb is the ideal fruit for this treatment. Its natural tartness cuts through all that butter and brown sugar, so the topping never feels cloying. As the muffins bake, the rhubarb softens and releases its juices into the brown sugar, creating a syrupy glaze that pools on top when you invert them.

The batter itself is straightforward but that hit of nutmeg makes it memorable. It’s warm and slightly woodsy, a better match for rhubarb than the usual cinnamon. Stir just until the flour disappears. Overmixing makes tough muffins, and you want these tender enough to tear apart with your fingers.

Leave the pan sitting upside down over the muffins for a few minutes after flipping. That lets the rhubarb syrup drip down and glaze every surface. Serve warm when that topping is still soft and gooey.

Kitchen Tips

• Chop the rhubarb finely so it cooks down completely in 25 minutes; large pieces stay fibrous
• Grease the muffin cups generously or the caramelized sugar will stick and tear the tops
• Don’t let the muffins cool in the pan; the sugar hardens and they’ll never come out clean
• These are best eaten the day they’re baked; the topping softens the muffin tops overnight

Variations

• Strawberry rhubarb: Mix diced strawberries with the rhubarb for a classic springtime pairing
• Ginger spice: Replace the nutmeg with ground ginger for a sharper, spicier flavor
• Oat crumble: Sprinkle a pinch of oat streusel on top of the batter before baking for extra texture