Blooming onion with dip

Ingredients

• 300 g white flour
• 3 tbsp sour single cream
• 4 ½ dl milk
• 2 eggs
• 4 spanish onions
• 1 tbsp paprika
• 200 g mayonnaise
• oil
• 3 tbsp ketchup
• 1 tbsp grated horseradish in a jar
• 1 tbsp lemon juice
• 2 ½ tsp garlic powder
• 1 ½ tsp salt
• 4 tsp smoked paprika
• 1 tsp cayenne pepper
• ½ tsp pepper