Pretty much any frozen treat is great for the summer, but Trader Joe's cold-brew-latte dessert bars are a fun midday pick me up, especially for those hot, lazy days of summer.It's a favorite adult treat (cold-brew coffee) combined with a beloved childhood treat (popsicles).Trader Joe's extra spicy ghost-chile BBQ sauce is made with the ghost pepper, which is one of the hottest peppers in the world.It is spicy but, per Trader Joe's, it's less potent if you use it as a marinade.Trader Joe's jalapeño sauce can be used as a dip, a salsa, a salad dressing, or as a substitute enchilada sauce. It's also super creamy and vegan. Trader Joe's key-lime pie is another seasonal favorite, but since you can freeze it, superfans tend to stock up in the summer and keep it in the freezer year-round.Per TJ's, the pie contains actual key-lime juice. If you've ever had mango and sticky rice at a Thai restaurant for dessert, you'll probably love the flavors of Trader Joe's mango and cream bars.These bars are like creamy popsicles (sans the wooden stick) made from mango sorbet and sweet cream. Plus they're kosher and gluten-free.The grocery chain unveiled the soft-baked peanut butter chocolate chip cookies at the end of May 2019 and they're sure to delight peanut butter and chocolate lovers. Trader Joe's first began selling this $1 canned wine a few years ago and the grocery chain has brought them back for summer. Simpler Wines has individual cans of sparkling rosé and flat white wines which are great for picnics, barbecues, or anybody who wants a portable drink. Sparkling watermelon juice sounds like the perfect refreshing summer beverage. Plus each can is only $1.Per Trader Joe's, you can also dress it up as a cocktail by adding fresh fruit and vodka to it.For summer, Trader Joe's has brought back its gallon of Sweet Tea. The chain's version of this summer staple is sweetened with cane sugar instead of high-fructose corn syrup.Peach is a fruit that's closely associated with warm weather, so it makes sense that Trader Joe's would bring back the peaches and cream tarte for the season.You can find it in the freezer section at your local TJ's during the early summer months. Trader Joe's cold-pressed watermelon juice is a recurring summer favorite. The drink contains 100% juice (watermelon and lemon juice), though most reviewers say it tastes like pure watermelon.Although TJ's now also has a bubbly watermelon water, you could mix your own version of that by adding some sparkling water to this juice drink.This juice is only available from May through August, so you may want to pick up two cases if you love it. The chain's Tzatziki dip has been around for quite some time, but it gets the most play at picnics and barbecues in the summer.The Greek-inspired, elevated take on a typical veggie dip pairs well with pretzels and baby carrots. A glass of rosé can be nice and refreshing during warm-weather months and Villa Alena rosé is available at Trader Joe's for $9.The company describes it as an off-dry, easy-drinking, rosé-lover's dream.Read More:11 chefs share the one food they always buy at Trader Joe's 10 things you should never do in a Trader Joe's, according to employees10 incredible foods you can only get at Trader Joe'sWe compared Trader Joe's stores in the city and in the suburbs — and the loser was clear11 beauty products from Trader Joe's that people swear by