Add sour cream and oil; toss with a fork to combine with the dry ingredients.
Sprinkle 2 tablespoons of ice water over the mixture.
Cover the bowl with plastic wrap and refrigerate for at least 1 hour and up to 2 days.

Or wrap airtight and freeze for up to 3 months.
The plastic will help prevent freezer burn while the foil will help keep off-odors from seeping into the food.
- Daily Values (DVs) are the recommended amounts of nutrients to consume each day.
(-) Information is not currently available for this nutrient.