Preheat oven to 375°.
Spray a 9 x 13 casserole dish with non stick cooking spray.
In a large bowl, combine sour cream, heavy cream, butter, chicken base, salt and pepper.
Peel and shred potatoes using the large side of a box grater.
Squeeze handfuls of shredded potatoes over the sink or over a bowl to remove excess liquid. This will keep the potatoes from being mushy. If using a bowl, discard liquid.
Place drained potatoes into a large mixing bowl and add diced onions, jalapeno and half of the bacon and half of the cheese.
Pour the sauce over the top and stir with a wooden spoon until thoroughly combined.
Add hashbrown mixture to prepared casserole dish and spread evenly.
Top with remaining shredded cheese and bacon crumbles.
Bake, uncovered for 45 minutes to 1 hour until casserole is bubbly and golden brown around the edges.
Remove from oven and cool about 5 minutes before serving.