Try this PB&J Oatmeal Muffins Recipe.
A dense, slightly chewy crumb studded with whole rolled oats emerges from the oven, anchored by the rich density of nut butter and sweetened pockets of fruit preserve. Past tests show that these oat-based structures easily turn gummy if the batter is over-mixed, developing too much gluten from any flour present or overhydrating the oats before baking.
Proper moisture control remains the primary challenge when baking with rolled oats, as dried grains absorb liquids unpredictably during the resting phase. Storing them correctly guarantees that the center retains its moisture without compromising the exterior crust.