1-Getting started with this rhubarb muffins recipe is exciting and simple, with a total time of about 40 minutes that includes 20 minutes for preparation and 18-22 minutes for baking. Preheat your oven to 350°F (175°C) and line 24 muffin cups to set the stage for success. In a large bowl, stir together the sugars, oil, buttermilk, egg, and vanilla until well mixed, creating the base of your batter.

2-Next, add the flour and baking soda, mixing just until combined to keep the batter light before folding in the diced rhubarb for that fresh burst of flavor. In a separate small bowl, combine the topping ingredients sugar, cinnamon, and softened butter with a fork to make a crumbly mix. Fill each muffin cup about two-thirds full, then top with roughly 1 teaspoon of the topping mixture for an extra touch of sweetness.

3-Bake the muffins in the preheated oven for 18 to 22 minutes, or until they are golden and a toothpick inserted in the center comes out clean. Let the muffins cool in the pan for 15 minutes before transferring them to a rack to cool completely, ensuring they stay moist and delicious.