In a large bowl stir together melted butter and eggs.

Add in brown sugar and stir to combine.

Stir in flour until just combined. Fold in the pecans.

Line mini cupcake pan with mini cupcake papers or grease well.

Dollop teaspoonfuls of batter into cupcake liners until about 2/3 full.

Bake at 350 degrees for about 20 minutes.

Remove from pan as soon as possible (unless you did not use cupcake liners, in which case you should let them cool)