Muddle the Blackberries:

In a cocktail shaker, muddle the fresh blackberries until they are well crushed.
Mix the Drink:

Add the Crown Royal Blackberry Whisky, orange juice, and ice to the shaker. Shake well until the mixture is chilled.
Prepare the Glass:

Fill a rocks glass with ice. Strain the blackberry whisky mixture into the glass.
Add Grenadine:

Slowly pour the grenadine over the back of a spoon to create a layered effect. The grenadine will sink to the bottom, creating a beautiful sunset gradient.
Garnish:

Garnish with an orange slice and a few fresh blackberries