Gather the ingredients.
In a cocktail shaker, add the strawberries and simple syrup.
Muddle well.
Fill the shaker halfway with ice.
Add the Cognac and white wine.
Shake well.
Pour the contents of the shaker (including the ice) into a wine goblet.
Top with sparkling wine.
Garnish with a strawberry. Serve and enjoy!

Tips
Though the drink's name says Champagne, any sparkling wine will do just fine. You can actually save some money by going with something that doesn't carry the French label's esteem, including Italy's Prosecco or Spain's Cava.
Likewise, you don't need to pour Cognac and can choose any brandy you like.
When choosing the two wines, think about contrasting the profiles to create a balanced drink. For instance, choose a dry Pinot Grigio for the still wine and a sweet sparkling rosé. Or, go with a sweet still Moscato paired with a brut (dry) Champagne.
Rosé wines naturally have a subtle strawberry flavor, so going with that style for one of the wines is a great fit for this recipe.
Be sure to rinse the strawberries to remove any debris.
Cut off the stems and slice each berry into thirds to make them easier to muddle.