01 -
In a large skillet over medium heat, melt butter and sauté finely chopped onion until tender and aromatic, about 3 to 4 minutes.
02 -
Add sliced kielbasa to the skillet with onions and cook until the sausage is lightly browned.
03 -
In a mixing bowl, whisk together softened cream cheese, sour cream, chicken broth, salt, and pepper until smooth and well combined.
04 -
Coat the inside of a slow cooker with non-stick spray to prevent sticking.
05 -
Layer half of the frozen pierogies, half the kielbasa and onion mixture, and half of the cream mixture in the slow cooker. Repeat layers with remaining ingredients.
06 -
Sprinkle shredded cheddar cheese evenly over the top layer.
07 -
Cover and cook on high for 2 to 3 hours or on low for 4 to 5 hours, until heated through and bubbly.