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| russet potatoes (diced): 1 cup (mashed) |
| salted butter: 3/4 cup |
| unsweetened baking chocolate squares: 2 oz |
| granulated sugar: 1 1/2 cups |
| eggs: 4 (lightly beaten) |
| vanilla extract: 1 tsp |
| salt: 1/2 tsp |
| all-purpose flour (unsifted): 1 cup |
| semisweet chocolate chips (chips): 3/4 cup |
| walnuts (chopped): 3/4 cup (chopped) |
Credit: Food.com