Preheat the oven to 400°F.
Grease a 2-qt. casserole dish with butter.
Peel and use a mandolin to slice the potatoes into 1/8 inch slices.
In a large bowl whisk together the heavy cream, and flour.
Add sour cream, garlic, salt, and pepper, mixing thoroughly.
Arrange ⅓ of the potatoes slices in the bottom of the casserole dish, overlapping the edges.
Pour 1/3 of the mixture over them, then sprinkle 1/3 of the bacon and ⅓ of the cheese on top.
Repeat this step to make a second layer.
For the final layer arrange potato slices and cover with last ⅓ of the liquid. Keep last ⅓ of cheese and bacon in reserve.
Cover dish with foil and bake for 40 minutes. Then uncover dish and continue baking for 20 minutes.
In the last 10 minutes add cheese and bacon to the top of the potatoes.
Let dish cool for 10 minutes before serving.
Garnish with chives