1. Peel the ripe peaches, cut in pieces and combine with the sugar in a blender. Add the peach ale and blend until mixture is smooth. Strain the resulting fresh peach puree through a sieve and let the foam settle (you may stir once or twice).
2. Fill chilled flute or tulip glasses about halfway with peach puree. Top with prosecco, pausing as needed to let the foaming subside. Garnish with a sprig of thyme (optional) and serve.
Notes
*Typically peach ales lack bitterness and have a rich, unmistakably ripe peach aroma. Try a peach saison, a peach pale ale, peach kolsch. If you cannot find any peach ale then use peach juice or peach flavored soda.Depending on the size of your glass you may have a bit of puree or prosecco or both left over to mix a fifth cocktail. Cheers!