Here is a cheap easy one.
6 oz semolina
4 oz soy flour
2 oz corn meal
2 oz rice flour
2 oz dry milk
Mix in 3 eggs. I blend them shell and all to give a crunch to your boilie.
you can add some kind of sweetner and flavor of your choice even koolaid works but there are companys here in the US that sell carp specific gear and bait mixes.
Mix everything together and roll into balls.
Put them in boiling water note the name (Boilies) for about a minute and a half to two minutes. Let air dry overnight to harden. Use or freeze till your ready to use them because they will spoil without preservatives. This is just one of MANY MANY recipes I have.
Heres another with some slightly harder to find ingredients
Dry Mix: 1/4 cup milk albumin,
3/4 cup casein, 1/4 cup calcium
caseinate(milk proteins), 1 cup milk powder,
1& 2/3 cups full-fat soy flour,1/4 cup egg albumin(protein),1/4 cup wheat gluten,
1/4 cup semolina, 1/4 cup wheat bran,
1/4 cup sugar, 2 tsp dog vitamins.
Liquid Mix: 6 eggs, 3tbsp cooking oil, 2 tbsp water, 4 tsp flavour 1 tsp peanut oil.
Add dry mix to wet mix slowly whilst stirring and then kneading as it becomes a paste untill it stops sticking. Leave dough in a plastic bag for 20 mins. If it is too sticky after "resting" you can knead some more dry mix. Roll into sausages and cut to size boilies you want and roll in palm for a ball or leave in a barrel shape. Boil for 2-3mins and place boiled bait on a towel for drying. Dry for at least 2-3 hours or for harder baits 10-12 hours. The longer the harder. Put in bags and freeze. Should be good for a year in the freezer
Shoot me a pm and I will tell you where to find more and where to order some boilies if your interested.
What State are you located in?