A method of making recyclable composite packaging structure including a fiber-containing layer and a mineral-containing layer, the method comprising: extrusion coating the mineral-containing layer onto the fiber-containing layer using a mineral-containing layer having mineral particles interspersed within a polyolefin bonding agent, wherein the mineral-containing resin has a density of 1.22 g/cm 3 to 1.41 g/cm 3 and a mineral content of 20% to 70 wt.%, the extrusion coating providing a moisture barrier having TAPPI T410 weights from 5.5 g/m 2 to 52.2 g/m 2, TAPPI T-464 moisture barrier values from 7.13 g/m 2 ·day (0.46 g/100 in 2 ·day) to 584.35 g/m 2 ·day (37.7 g/100 in 2 ·day), TAPPI T441 Cobb 2-minute water absorption from 0.00 to 0.40, T441 30-minute water absorption from 0.00 to 0.45, a TAPPI T559 grease resistance of 12.0, a basis weight of 6 to 98 g/m 2 (4 lbs/3msf to 60 lbs/3msf), and a caliper from 7.6·10 -3 to 8·10 -2 millimeter (0.30-3 mil); wherein the extrusion process is carried out under the following conditions: the resin having a melt flow index from 4 g/10 min to 16 g/10 min; a melt temperature from 226.7 °C to 337.8 °C (440° F to 640° F); an extruder screw or tube barrel pressure from 8,274 - 17,237 kPa (1,200 psi to 2,500 psi); an air gap from 10.16 cm (4") to 40.64 cm (16"); a die gap from 0.51 mm (0.020") to 1.27 mm (0.050"); barrel and die zone temperatures from 204.5 °C to 337.8 °C (400° F to 640° F); and an extrusion lamination line speed from 0.51 m/s (100 FPM) to 17.78 m/s (3,500 FPM). extrusion coating the mineral-containing layer onto the fiber-containing layer using a mineral-containing layer having mineral particles interspersed within a polyolefin bonding agent, wherein the mineral-containing resin has a density of 1.22 g/cm 3 to 1.41 g/cm 3 and a mineral content of 20% to 70 wt.%, the extrusion coating providing a moisture barrier having TAPPI T410 weights from 5.5 g/m 2 to 52.2 g/m 2, TAPPI T-464 moisture barrier values from 7.13 g/m 2 ·day (0.46 g/100 in 2 ·day) to 584.35 g/m 2 ·day (37.7 g/100 in 2 ·day), TAPPI T441 Cobb 2-minute water absorption from 0.00 to 0.40, T441 30-minute water absorption from 0.00 to 0.45, a TAPPI T559 grease resistance of 12.0, a basis weight of 6 to 98 g/m 2 (4 lbs/3msf to 60 lbs/3msf), and a caliper from 7.6·10 -3 to 8·10 -2 millimeter (0.30-3 mil); wherein the extrusion process is carried out under the following conditions: the resin having a melt flow index from 4 g/10 min to 16 g/10 min; a melt temperature from 226.7 °C to 337.8 °C (440° F to 640° F); an extruder screw or tube barrel pressure from 8,274 - 17,237 kPa (1,200 psi to 2,500 psi); an air gap from 10.16 cm (4") to 40.64 cm (16"); a die gap from 0.51 mm (0.020") to 1.27 mm (0.050"); barrel and die zone temperatures from 204.5 °C to 337.8 °C (400° F to 640° F); and an extrusion lamination line speed from 0.51 m/s (100 FPM) to 17.78 m/s (3,500 FPM). the resin having a melt flow index from 4 g/10 min to 16 g/10 min; a melt temperature from 226.7 °C to 337.8 °C (440° F to 640° F); an extruder screw or tube barrel pressure from 8,274 - 17,237 kPa (1,200 psi to 2,500 psi); an air gap from 10.16 cm (4") to 40.64 cm (16"); a die gap from 0.51 mm (0.020") to 1.27 mm (0.050"); barrel and die zone temperatures from 204.5 °C to 337.8 °C (400° F to 640° F); and an extrusion lamination line speed from 0.51 m/s (100 FPM) to 17.78 m/s (3,500 FPM).