Spray your 4 quart crock pot with non-stick cooking spray.
Melt butter and mix together with cake mix in a large mixing bowl.
Pour the pie filling into the 4 quart crock pot and spread evenly across the bottom.
Sprinkle cake mix mixture over pie filling.
Top with walnut pieces.
Cover and cook for 2-3 hours on low, turning your insert halfway through cooking if your slow cooker does not cook evenly.
Notes
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As with any of our recipes, carb counts, calorie counts and nutritional information varies greatly. As a result, your nutritional content depends on which products you choose to use when cooking this dish. The auto-calculation is just an automated estimate and should NOT be used for specific dietary needs.
All slow cookers cook differently, so cooking times are always a basic guideline. Recipes should always be tested first in your own slow cooker and time adjusted as needed.