Preheat oven to 350 degrees. Unwrap butter on the bottom and run it along the bottom and sides of 6 x 10 baking pan.
Using a paring knife I cut loquats into smaller pieces with no particular size or shape. The fruit bruises easily so I prefer this method. Sprinkle 1/4 cup brown sugar over the fruit. Scatter the pecans on top of both.
In a medium mixing bowl, place stick of butter into microwave for one minute.
Introduce the 1 cup brown sugar to the butter and stir well. Add in the remaining ingredients and stir well. When batter is mixed together well pour over loquats in baking dish to evenly distribute the batter. Do not stir.