In a large bowl combine the spices and buttermilk powder.
Whisk until completely combined.
Store in an airtight container in the refrigerator for up to 3 weeks.
Notes
To Use: Dressing: 1 tablespoon + 1/3 mayo + 1/3 cup milk Dip: 2 tablespoons + 16 oz sour cream Packet: 2 tablespoons = 1 store bought packet
Use powders, not granulated garlic and onion, so the mix dissolves into the milk or sour cream and it's not grainy.
Store this one in the fridge if you want it to last longer, since the buttermilk powder is dairy.
Shake the jar before each use since the finer spices settle.
Let dips and dressings rest at least 30 minutes so the herbs rehydrate and flavor the mix.
Nutrition information is just for the mix. You will need to take any additional ingredient into account when making.