1. Combine all Plugrá Butter, orange juice, zest and honey in a mixer on low speed until combined.
2. Roll into a log in parchment or wax paper and refrigerate until ready to use.
3. Combine berries and sugar, set aside.
4. Slice pound cake into 1-inch-thick slices.
5. Place pound cake slices on a baking sheet and toast until lightly golden brown.
6. Spread each slice of pound cake with Orange Honey Butter.
5. Top with blackberries and serve.