In large bowl, combine melted chocolate chips, bananas, butter, vanilla and eggs; mix until smooth. Add brownie mix; beat 50 strokes with spoon. Divide half of batter evenly into sprayed muffin cups. (Cups will be slightly less than half full.) Cut off small corner of fudge packet. Squeeze about 1 teaspoon fudge filling into center of batter in each muffin cup. Top with remaining batter. Sprinkle pecans over batter; press in gently.