Combine all the ingredients together in an airtight glass jar and store it in a cool and dark place.
To prepare one portion, whisk 2 tablespoons of dry soup mix with 1 cup of cool water in a saucepan until smooth.
Bring to a simmer, then reduce the heat to low and simmer for 5 minutes, stirring continuously. Serve hot.
Notes
Use fine milk powder for the smoothest texture. Whole milk powder will give the soup a richer, creamier consistency, while skimmed milk powder works for a lighter version.
Make sure all the ingredients and utensils are completely dry before preparing the mix to prevent clumping during storage.
Mix the dry ingredients thoroughly so the flour, milk powder, herbs, and seasonings are evenly distributed.
To prepare one serving, whisk 2 tablespoons of the dry soup mix into 1 cup of cold water. Simmer over low heat for 5 minutes, stirring continuously until smooth, thickened, and fully cooked.
Add a little extra water or milk if the soup becomes too thick, or use slightly less liquid for a thicker consistency.
Adjust the salt according to the saltiness of your chicken broth powder, as some brands are already heavily seasoned.
Replace the chicken broth powder with vegetable or mushroom stock powder for a vegetarian version.
Add dehydrated vegetables such as carrots, peas, corn, or mushrooms to the dry mix for extra flavor and texture.
Stir in cooked shredded chicken, sautéed mushrooms, or cooked vegetables when preparing the soup for a heartier meal.
Add a pinch of black pepper, paprika, or red pepper flakes for extra flavor.
Store the dry mix in a clean, airtight container in a cool, dry, dark place, following the shortest storage period recommended for the individual ingredients.
Use a clean, dry spoon each time you scoop out the mix to prevent moisture from getting into the container.