In a large skillet cook bacon over moderately low heat, stirring, until crisp. Transfer bacon to paper towels and pour off all but 2 tablespoons fat. In reserved fat cook onion and garlic with salt and pepper to taste over moderately low heat, stirring, until softened and pale golden. Add chili powder and cumin and cook, stirring, 1 minutes. Add beans and cook, stirring, 5 minutes.
In a food processor, purée bean mixture with all remaining ingredients except bacon until smooth and transfer to a bowl. Crumble bacon and stir into dip with salt and pepper to taste. Dip may be made 1 day ahead and chilled, covered. Bring dip to room temperature before serving.
Serve dip with tortilla chips or crudit's.Makes 4 Source: