Blueberry hand pies

Ingredients

• 1 cup Dr. Pepper
• 340 grams frozen blueberries (about 2 cups)
• 1/4 cup brown sugar
• 1/2 teaspoon cinnamon
• Grated zest of 1 lemon
• 2 1/2 cups all-purpose flour
• 1 1/4 teaspoons salt
• 3/4 cup vegetable shortening, frozen
• 5 tablespoons unsalted butter, frozen
• 2 ice cubes
• 1/2 cup + 2 tablespoons water, divided
• 1 egg
• 1 cup icing sugar
• 2 tablespoons heavy (35%) cream