Dianne~ Your question is a good one!

Spray was a brand name of a solid vegetable shortening (not butter flavored) that was available from the 1930 to the early 1950s.
____________________________________

The following is a bit of history I found on the web regarding “Spry.”

Crisco became an integral part of cooking after it was introduced in 1911. After World War I, similar products were introduced into the marketplace. These included VEGELINE (French) and SPRY solid vegetable shortening (by Unilever Corporation). Neither Vegeline nor Spry ever matched the popularity of Crisco. Many of the recipes from the 1930s to 1950s will simply call for “Spry.”
__________________________

On Monday, January 18, 1937, AUNT JENNY'S REAL LIFE STORIES debuted on Columbia Network's daytime schedule for Spry Shortening. As the listeners would find out, this serial program wasn't your typical radio soap opera--- and it wasn't your typical relationship between program and sponsor, either!

Several daytime shows during radio's golden age have had some long running relationships between program and sponsor. Almost by instinct, the listeners associated Oxydol with MA PERKINS, Bab-O with DAVID HARUM, and of course, Spry with AUNT JENNY. The relationship between program and sponsor was very impressive, but the relationship between Spry and AUNT JENNY was not only impressive, but also unique in how they helped each other out.

But we are getting ahead of ourselves. First, let's take a look at the program. AUNT JENNY'S REAL LIFE STORIES featured the people who lived in the town of Littleton. These people had their share of happiness, sadness, romance, and the other good emotional stuff radio soap operas were famous for. The stories were usually completed in 5 episodes, and a new one would begin the following Monday with different characters. You may notice that I didn't mention Aunt Jenny's name among the people who were involved in the story. There was a good reason--- she wasn't in the story. On the program, Aunt Jenny served as hostess and narrator. Here is where the unique relationship between program and sponsor would take place.

When the story for the broadcast was completed, Aunt Jenny and program announcer Dan Seymour would briefly talk about the latest events in the story, then turn their attention to the recipe of the day. Of course, the recipes would vary from main dish to dessert, but they would all have one common denominator--- the services of Spry Shortening. Aunt Jenny wasn't bashful in the least for mentioning Spry when it came to using shortening. She stated that no other shortening or baking fat would come close in bringing out the flavor of the ingredients as Spry could. Since Spry was mentioned and talked about frequently between Aunt Jenny and Seymour, the recipe of the day also served as Spry's closing commercial.
Since the program achieved respectable ratings during its long run, the on-the-air combination of Aunt Jenny and Spry Shortening was a formidable one--- but it didn't stop there. There was another form of advertising the duo was featured.

In ladies magazines such as Ladies Home Journal, McCall's, Good Housekeeping, and Woman's Home Companion, Spry magazine ads featured a recipe that of course required the services of Spry Shortening. To cap off the ad, a picture of Edith Spencer (who played Aunt Jenny on the program) was found. She informed the readers that they could all be better cooks if they used Spry. Of course, it didn't hurt if the magazine ad gave a gentle reminder for the readers to tune in to AUNT JENNY'S REAL LIFE STORIES--- as if the readers needed reminding of that fact!

This type of magazine ad continued until Ms. Spencer left the AUNT JENNY program--- but the character of Aunt Jenny would continue to be featured in Spry recipe magazine advertising until the program's demise in 1956. The character of Aunt Jenny (whose facial features were different from Ms. Spencer's) would either be pictured in cartoon form, or her name was mentioned with the latest recipe.

The final episode of AUNT JENNY'S REAL LIFE STORIES aired on Friday, September 28, 1956. With sponsors pulling out from radio at an alarming rate, Spry stayed all the way with the program (Franco-American products would co-sponsor the program with Spry during its final 3 months on the air). The radio listeners lost a good friend when Aunt Jenny said her final good-bye to the listeners. For nearly 2 decades, Aunt Jenny helped any cook from "butterfingers" to "expert" become better cooks with her numerous and easy-to-follow recipes. Of course, they would be better cooks if they used Spry Shortening.