Thin Mint GSC

Also known as: Thin Mint Girl Scout Cookies, Thin Mints, Thin Mint Cookies, Thin Mintz, GSC Thin Mints

Breeder: Cookie Fam Genetics — San Francisco Bay Area. Phenotype selected by Jigga (Jai Chang), with Berner (Gilbert Milam Jr.) commercializing and Sherbinski (Mario Guzman) later crossing it with Sunset Sherbet to create the Gelato line.

Lineage & Genetics

Cross: Clone-only phenotype selection of Girl Scout Cookies (F1 Durban x Florida OG Kush)

OG Kush (via Florida OG / Flo Rida OG cut) — originated in South Florida early 1990s from Chemdawg and Hindu Kush genetics. Brought from Florida to Los Angeles by Josh D circa 1996. Contributes dense resin production, fuel/gas/spice aromatics, heavy euphoric body effect, tight bud structure, and high potency ceiling. Durban Poison (via F1 Durb selection) — South African landrace sativa. The F1 Durb was a specific Northern California clone-only selection with a sweet-spicy terpene profile. Contributes cerebral uplift, sweet/anise/spicy notes, tight bud density, energizing onset, and a huge part of the terpene signature that became the Cookies hallmark.

Terpene Profile

Aroma: Primary cool mint, menthol, and fresh herb. Secondary dark chocolate, sweet cookie dough, and baked goods. Base layer of spicy earth, fuel (OG Kush contribution), and subtle anise. Jar appeal is dessert-forward sweetness with cooling herbal notes that intensify over weeks with proper curing.

Flavor: Inhale is mint chocolate chip — smooth, sweet, with a cooling sensation on the throat. Exhale delivers cookie dough sweetness with a peppery spice finish from caryophyllene. Aftertaste is lingering mintiness with earthy, nutty undertones. Distinct from other GSC phenos in leaning harder into herbaceous coolness.

Effects & Experience

Onset: Rapid cerebral rush within 0-5 minutes — mental clarity, euphoria, creative spark from the Durban Poison influence.

Cerebral effects merge with warm grounding body relaxation at 15-30 minutes without immediate sedation. Full-body relaxation with clear-headed focus and warm body melt without heavy lethargy during the 30 min to 2 hour plateau. Gradual easing into deep relaxation with potential drowsiness at higher doses during the 2-4 hour comedown.

Duration: 2-4 hours inhaled; 6-12 hours in edibles

Growing Characteristics

Grow Tips: OVERFEEDING NITROGEN IN FLOWER is the #1 Thin Mint mistake. Excess N during bloom blunts the mint-chocolate terpene expression and can cause dark crispy leaf tips. Reduce N immediately at flip. High nitrogen demand during veg — feed heavily with N then. Thin Mint shows sensitivity to excess nitrogen during early flower causing nutrient lockout and reduced terpene expression. Increase phosphorus and potassium for bud density and resin. Fermented banana KNF preparations work well for K. Use bloom formulations weeks 3-7. Flush with plain pH water for final 10-14 days to clear nutrient salts and encourage deep purple coloration and cleaner flavor. TRAINING: SCROG is the best method — compact bushy structure fills a net beautifully. Top early and often during veg — responds exceptionally well to multiple toppings. LST around week 3 of veg to spread canopy. Defoliate twice: first at the flip to 12/12 (remove large fan leaves blocking bud sites), second at week 3 of flower (improve airflow and light). Week 6 optional light leaf tuck. Without training, inner canopy gets no light and produces small airy larf buds. PEST AND DISEASE: Botrytis (bud rot) is HIGH risk — dense rock-hard buds trap moisture internally. RH must be below 45% in late flower. HEPA filtration on intakes. Silica supplementation strengthens cell walls. Never spray anything on buds after week 3 of flower. Key principle: the dense bud structure that makes Thin Mint visually appealing is also its Achilles heel — one humidity spike during late flower can destroy an entire cola from inside out without visible external signs until too late. HARVEST: 70% cloudy / 30% amber on calyxes for peak mint-cookie flavor and balanced effect. Most growers harvest around day 60. Buds build resin coat and swell significantly in final 7-10 days — cutting at week 7 leaves 20%+ potential on the table. Inspect inner buds for botrytis before final chop. DRYING: 60F and 60% RH, slow and cold, 10-14 days minimum. This is CRITICAL for Thin Mint — the signature mint finish comes from volatile monoterpenes that evaporate quickly at higher temperatures. A fast dry at 70F+ produces hay-smelling flower with no mint character. CURING: Glass jars 75% full, burp 1-2 times daily for first week then every 2-3 days, optimal 4-6 weeks minimum for full terpene development. Storage with 62% Boveda packs. Proper curing breaks down chlorophyll, allows complex terpenes to mature, smooths the smoke, and develops the iconic sweet-mint complexity. Common mistakes: rushing the dry (destroys volatile monoterpenes), ignoring humidity in late flower (guaranteed bud rot), skipping defoliation (broad fan leaves create dead zones), harvesting too early (losing final 20% potential), using this as a hash/wash strain (trichomes are greasy and sticky not sandy/brittle — grow for flower and rosin not full-melt), expecting huge yields (moderate 300-500 g/m2 — do not push with excess nutrients), and growing from seed without pheno-hunting (authentic Thin Mint is clone-only, seeds require selection to find mint-chocolate expression).

History & Origin

Girl Scout Cookies was created by Jigga (Jai Chang) in San Francisco's Sunset District in the mid-2000s by crossing F1 Durb with Florida OG Kush. GSC circulated in Bay Area medical circles around 2007-2010. In the early 2010s Cookie Fam pheno-hunted GSC seeds and isolated the Thin Mint expression for its mint-chocolate nose, deep purple coloration, and stabilized high-THC profile. GSC broke through to national prominence by 2011-2012. Thin Mint achieved near-mythic status as a clone-only selection. In the mid-2010s Sherbinski crossed Thin Mint with Sunset Sherbet to create the Gelato line. GSC won Best Hybrid at the 2013 Southern California Cannabis Cup. S1 seeds and backcrosses are now available from various breeders.

Notable Crosses

Strains bred using Thin Mint GSC as a parent: