Prepare cake according to package or recipe instructions, then set aside to cool.
1 prepared German chocolate cake
For frosting, combine evaporated milk, sugar, butter, vanilla extract, egg yolks, and salt in a saucepan. Stir constantly over medium heat using a heat resistant spatula or a wire whisk until thickened.
2 cups evaporated milk, 2 cups granulated sugar, 1 cup salted butter, 1 Tablespoon vanilla extract, 6 egg yolks, 1/4 teaspoon salt
Add coconut and pecans and stir to combine. Allow to cool in a refrigerator or chill on an ice bath if needed immediately.
3 cups shredded, sweetened coconut, 1 3/4 cups chopped pecans
To assemble, in a large bowl, use your hands to crumble cake into small crumbs. Spoon coconut pecan frosting into bowl and stir until mixture is well-combined.
Use a small scoop to scoop even size balls of dough. Roll dough between your palms until round like a ball. Place on a baking sheet covered with parchment paper, and refrigerate or freeze for 1 hour.
Place chopped chocolate in a microwave-safe bowl and microwave it until melted, stirring every 20 seconds to prevent overheating.
1 1/2 pounds milk chocolate
Using a fork, submerge a cake ball in melted chocolate. Gently tap fork on side of bowl to remove excess coating. Replace dipped truffle on baking sheet covered with parchment paper. Top each truffle with a sprinkle of coconut and chopped pecans. Repeat with remaining cake balls.
Additional coconut, Additional chopped pecans
Refrigerate truffles to set coating, about 15 minutes. Truffles are best served at room temperature, but must be stored in refrigerator in an airtight container.