Fudge with nuts

1/4 cup butter , softened 1 (18 1/4 ounce) package fudge cake mix 1 egg , lightly beaten 2 tablespoons water 3/4-1 cup walnuts , finely chopped 48 chocolate[...]

1 cup walnuts (120 grams, I used pecans) 1 1/3 cups pitted dates (230 grams, If you want a sweeter result, up the proportion of dates) 1 teaspoon vanilla[...]

1 (12 ounce) package semi-sweet chocolate chips 2 ounces unsweetened chocolate, chopped 3 tablespoons butter 2 eggs 1/4 cup all-purpose flour 1 teaspoon[...]