Danish Creamery : Shrimp and Corn Elote Tostada

Ingredients

• 2 avocados
• ¼ cup sour cream
• 2 Tablespoons lime juice
• 1-2 Tablespoons water, to thin
• Kosher salt
• freshly ground black pepper
• 1 pound shrimp, peeled and deveined
• ¼ teaspoon chili powder
• ¼ teaspoon ground cumin
• 2 Tablespoons olive oil
• 4 ears of corn, shucked
• 4 Tablespoons Unsalted Danish Creamery Butter, melted, divided
• 2 Tablespoons sour cream
• 1 Tablespoon mayonnaise
• 1 Tablespoon lime juice
• 1 jalapeño, minced
• ½ bunch cilantro, chopped, plus more for garnish
• ½ cup Cotija cheese
• 8 corn tostada shells
• Lime wedges, for serving