Toss cheese and flour until cheese is coated with flour.
Heat cream in a double boiler over medium heat. When cream begins to simmer ad 1/2c cheese. Stir to incorporate. When melted add another 12/2 c cheese and stir until melted repeat until all cheese is melted.
Stir in jalapenos and sour cream. Keep dip warm over low heat, but don't allow to boil.