In a bowl, combine the flour, sugar, baking powder and salt. Cut in butter until crumbly. Stir in milk, a tablespoon at a time, and toss with a fork until mixture forms a ball. Turn dough onto a lightly floured surface; roll into a 7-in. square. Spread with 2 tablespoons butter.
Combine the brown sugar and cinnamon; sprinkle over butter. Roll up jellyroll style. Cut into six even slices. Place cut side up in greased muffin cups. Bake at 400° for 18-20 minutes or until golden brown. Melt remaining butter; brush over rolls. Serve warm.