In microwave melt peanut butter chips with milk. Stir until smooth. Pour into a foil lined and greased 9 inch baking pan. Cool completely at room temperature. Lift out of pan and invert on cutting board.
Remove foil. Cut into about 3 inch by 1/4 inch strips. Fold muffin cup liners in half, pressing out creases; fold in half again, point under; use as holder for fries. Use red icing for ketchup if desired.