Mix oats, sugar, vanilla sugar, and cocoa in a large bowl.
Using your hands or a potato masher, incorporate the butter into the dry ingredients until the dough has an even consistency.
Add the coffee and mix until incorporated.
Fill a small bowl with flaked coconut or pearl sugar.
With your hands, roll the dough into 1-inch (3 cm) diameter balls.
Roll each ball in the coconut or pearl sugar and place on a tray.
Chill chocolate balls for at least one hour before serving.
Notes:
Calories 207
Calories from Fat 94
Total Fat 10.4 g
Saturated Fat 7.5 g
Cholesterol 20 mg
Sodium 92 mg
Total Carbohydrates 26.2 g
Dietary Fiber 1.0 g
Sugars 12.9 g
Protein 2.2 g
Vitamin A 3%
Vitamin C 2%
Calcium 3%
Iron 4%
