Summer Spritz Syrup Rosemary-Grapefruit

Summer Spritz Syrup Rosemary-Grapefruit. The only one in the line with a genuine bitter note.

Summer Spritz Syrup Rosemary-Grapefruit is an aperitif syrup made from grapefruit, rosemary, and cloudy organic apple cider vinegar — the tart variety in the Summer Spritz line. Not a berry syrup, not a bitter liqueur, not a syrup for guests who prefer things smooth and sweet.

Summer Spritz Syrup Rosemary-Grapefruit is the aperitif syrup from Manufaktur Schusters Shrub, where two types of tartness meet. The other varieties from the brand use acidity against sweetness. This one additionally brings bitter notes, and bitter is not acidic. It's a flavor in its own right, with its own rules. If the berry varieties in the line are too sweet for you, this is the answer.

Bitter and sour are not the same

The aroma leads with grapefruit, juicy and framed by a tart edge. Behind it lies rosemary, cool and針-like.

In the glass, a pale pink appears, almost disappearing under sparkling wine. Grapefruit only colors faintly, and without dye, it stays that way. If you expect a vibrant glass, you won't get it here.

Grapefruit is the only citrus fruit in the range that brings notable bitter compounds. The most important one is naringin, located in the peel and the white pith underneath.

On the palate, the difference is easily understood. Acidity comes quickly, intensifies, and then fades. Bitterness comes later, spreads out flat, and lingers. That's why the two don't cancel each other out but rather add up. The acetic acid cuts in front, and the naringin follows behind. Rosemary lays a resinous-green stripe in between.

The finish has a dry bitterness, longer than any other variety from the brand. If you expect a juicy-fruity grapefruit syrup, you will find the bitterness too persistent. This variety is not suitable for guests who fundamentally leave bitter lemonades and tart aperitifs untouched.

With sparkling wine in the morning, with gin in the evening, with water in between

Four centiliters over ice, topped with about 100 milliliters of dry sparkling wine. The bitterness stands up to the effervescence instead of being lost in it.

With gin, the same approach becomes a long drink. Juniper and rosemary intertwine because both are resinous in structure. Two centiliters of gin are enough; the syrup, which already brings acidity, sweetness, and aroma, does the rest.

With pure mineral water, you can go further than with the berry varieties. Bitter compounds withstand dilution better than fruit aromas, as the perception threshold for bitterness is low. Where a berry disappears in water, grapefruit still stands out.

From experience: Use a sparkling wine without residual sugar. A semi-dry sparkling wine will cover the bitterness and turn a sophisticated aperitif into a lemonade with alcohol. The green variety of the line with a herbal note is the refreshing counterpart.

What sugar does and doesn't do to bitter compounds

Sugar doesn't remove bitter compounds. It masks them. Both flavors dampen each other's perception without changing the amount in the glass.

This has a consequence that only becomes apparent at the table. As the ice melts, the perception of sweetness drops faster than bitterness. A heavily sweetened bitter aperitif often becomes unpalatable in its final third. This variety is constructed differently from the outset. The rosemary doesn't mask the grapefruit; it stands alongside it. The glass carries through to the last sip.

Grapefruit and rosemary sprigs infuse together in cloudy organic apple cider vinegar for four to six weeks, without any heat. Afterwards, it is pressed and flavored with sugar, and this is where Hanna Schuster's training as a food technologist pays off. Together with Gabi Schuster, she develops the recipes in the manufactory in Untersteinbach. Hot-filled, the bottle then lasts for about three years, making preservatives unnecessary. The variety was new to the line for the 2025 season, which, alongside the classic shrubs, is already the younger development of the company.

The variety for those who find berries too sweet

The Summer Spritz line started with berries and remained so for a long time. This variety caters to a taste that a fruit syrup structurally cannot.

Berries bring acidity, but no bitter compounds. Those seeking bitterness in an aperitif usually end up with liqueurs with alcohol and high sugar content. Here, the same direction is available without either. As a gift, this is the choice for hosts whose aperitif can be dry. A glass before dinner here is preparation for it, not a distraction from it. If you'd rather have the herb next to a lemon, reach for the variety that takes the same rosemary into the kitchen. The sugar content is still a good 60 grams per 100 milliliters. The fact that the syrup tastes tart doesn't change this number, and pure, it remains considerable.

An aperitif syrup for those who briefly frown at the first sip and are already refilling at the second.