1-First Step: Gather your ingredients. Take the Cadbury Creme Eggs out of the fridge. If they have been sitting at room temperature, place them in the freezer for about 10 minutes. This firms up the chocolate and the fondant filling, preventing them from melting too quickly and making the shake too runny. Measure out your ice cream and milk so they are ready to go.

2-Second Step: Prepare your serving glasses. For the best experience, chill your glasses in the freezer for at least 15 minutes before you plan to pour the shake. A cold glass keeps the drink frosty for longer. If you want to get fancy, you can drizzle some chocolate syrup along the inside of the glass while it chills.

3-Third Step: Chop the Cadbury Creme Eggs. While you can put them in whole, chopping them into quarters helps them blend more evenly. This ensures you do not end up with large chunks of fondant in your straw. Place the chopped eggs into the blender canister.

4-Fourth Step: Add the liquids and solids. Pour the 1/2 cup of milk and the 2 cups of vanilla ice cream into the blender over the eggs. If you are using vanilla extract or a pinch of sea salt, add those now. Using full-fat ice cream is highly recommended here because the higher fat content creates a richer mouthfeel.

5-Fifth Step: Blend the mixture. Start your blender on the lowest setting to break up the large chunks of ice cream and chocolate. Gradually increase the speed to high. Blend for about 30 to 45 seconds. You want the mixture to be smooth and thick. Stop the blender and scrape down the sides if necessary to ensure everything is incorporated.

6-Final Step: Pour and garnish. Remove the chilled glasses from the freezer. Pour the thick milkshake into the glasses, being careful not to overflow them if you have added syrup to the sides. Top generously with whipped cream. You can crush an extra half Cadbury Egg and sprinkle the pieces on top for extra crunch and flavor. Add a maraschino cherry or colorful sprinkles if desired. Serve immediately with a straw and a long spoon to scoop up any melted bits at the bottom.