A chocolate ganache uses equal parts of chocolate chips and heavy cream, in weight measurements. Place 170 grams (6 ounces) of chocolate chips in a heatproof bowl. In a small saucepan, gently warm 170 grams (6 ounces) of heavy cream over medium heat until hot, but not simmering. Next, pour the hot cream over the chips, making sure they're submerged. Then let the mixture sit for 2 minutes, and slowly stir with a whisk until the ganache is completely smooth. Let the chocolate ganache cool. It will thicken and firm up the longer it sits, so use it once it reaches the drizzling consistency you want.