Refried Beans - cooking recipe

Ingredients

2 c. pinto beans
4 Tbsp. oil, divided
2 tsp. salt
1 slice bacon (optional)
5 c. water
1 to 2 Tbsp. flour

Preparation

Fill pressure cooker 2/3 full of water.
Add beans, 2 tablespoons oil and salt.
Cook for 1 to 1 1/2 hours at medium heat.